巴西专利BR112012010883B1 ophthalmic lens element, and, method for retarding myopia progression

专利PDF首页>>巴西专利

专利附录

专利说明

权利要求

类似技术

同族专利

引用文献

法律状态

优先权

专利摘要:
ELEMENT OF OPHTHALMIC LENS, AND, METHOD FOR DELAYING PROGRESSION OF MYOPIA. A progressive ophthalmic lens element (100) is exposed. The progressive ophthalmic lens element (100) includes an upper viewing area (102), a lower viewing area (104), a corridor (106), and a peripheral region (108) arranged on either side of the lower viewing area (104). The upper viewing area includes a distance reference point (DRP) and an adjustment cross (110), and provides a first refractive power for distance viewing. The lower viewing area (104), which is for close-up viewing, provides an added power over the first refractive power. The corridor (106) connects the upper (102) and lower (104) zones and provides a refractive power ranging from that of the upper viewing area (102) to that of the lower viewing area (104). The peripheral region (108) includes a zone (120,122) of positive power in relation to the addition power which still provides a positive refractive power in relation to the refractive power of the lower viewing zone (104). The zones (120, 122) of relative positive power are arranged immediately adjacent to the lower display zone (104) so that the lower display zone interposes (104) the zones of relative positive power (120,122).
公开号:BR112012010883B1
申请号:R112012010883-2
申请日:2010-11-09
公开日:2020-11-17
发明作者:Saulius Raymond Varnas
申请人:Carl Zeiss Vision International Gmbh；
IPC主号:

专利说明:

[001]. This application claims the priority of Australian Provisional Patent Application No. 2009905468 filed on November 9, 2009, the content of which should be incorporated here for reference. FIELD OF THE INVENTION
[002]. The present invention relates to ophthalmic lens elements to slow or stop the progression of myopia. BACKGROUND OF THE INVENTION
[003]. To provide focused vision, an eye must be able to focus light on the retina. The ability of an eye to focus light on the retina depends, to a great extent, on the shape of the eyeball. If an eyeball is “too long” in relation to its focal length “on the axis” (meaning, the focal length along the optical axis of the eye), or if the outer surface (that is, the cornea) of the eye is too curved, the eye will be unable to properly focus on distant objects on the retina. Similarly, an eyeball that is "too short" in relation to its focal length on the axis, or that has an outer surface that is too flat, will be unable to properly focus on nearby objects on the retina.
[004]. An eye that focuses on distant objects in front of the retina is referred to as a myopic eye. The resulting condition is referred to as myopia, and can usually be corrected with appropriate single vision lenses. When fitted to a user, conventional single vision lenses correct myopia associated with central vision. Meaning, conventional single vision lenses correct myopia associated with vision, which you use for fovea and parafovea. Central vision is often referred to as foveal vision.
[005]. Although conventional single vision lenses can correct myopia associated with central vision, it is known that off-axis focal length properties often differ from axial and para-axial lengths (Ferree et al. 1931, Arch. Ophth. 5 , 717 - 731; Hoogerheide et al. 1971, Ophthalmologica 163, 209 - 215; Millodot 1981, Am. J. Optom. Physiol. Opt. 58, 691 - 695). In particular, myopic eyes tend to exhibit less myopia in the peripheral region of the retina compared to their foveal region. This is often referred to as a peripheral hypermetropic displacement of the image. This difference may be due to a myopic eye having an elongated vitreous chamber shape.
[006]. More specifically, a study in the United States (Mutti et al. 2000, Invest. Ophthalmol. Vis. Sci., 41: 1022 - 1030) found that the mean (± standard deviation) peripheral retractions relative to 30 ° field angle in myopic eyes of children produced +0.80 ± 1.29 D of spherical equivalent.
[007]. Interestingly, studies with monkeys have indicated that a defocusing of the peripheral retina alone, with the fovea becoming clear, can cause an extension of the foveal region (Smith et al. 2005, Invest. Ophthalmol. Vis. Sci. 46: 3965 - 3972; Smith et al. 2007, Invest. Ophthalmol. Vis. Sci. 48, 3914 - 3922) and the consequent myopia.
[008]. On the other hand, epidemiological studies have shown the presence of a correlation between myopia and close work. It is well known that the prevalence of myopia in the well-educated population is considerably higher than for unskilled workers. It was suspected that prolonged reading causes a hypermetropic foveal blur due to insufficient accommodation. This has led to the fact that many eye care professionals prescribe progressive lenses or bifocal lenses for teenagers who manifest myopia progression. Special progressive lenses are designed for use by children (US 6,343,861). The therapeutic benefit of these lenses in clinical trials has been shown to be statistically significant in delaying the progression of myopia, but clinical significance appears to be limited (eg, Hasebe et al. 2008, Invest. Ophthalmol. Vis. Sci. 49 (7), 2781 -2789; Yang et al. 2009, Ophthalmic Physiol. Opt. 29 (1), 41 -48; and Gwiazda et al., 2003, Invest. Ophthalmol. Vis. Sci., Vol.44, pp.1492 - 1500 ). However, Walker and Mutti (2002), Optom. Vis. Sci., Vol. 79, pp.424 - 430, found that accommodation also increases the relative peripheral refractive error, possibly due to choroidal tension during accommodation, pulling the peripheral retina inward.
[009]. A trigger for the progression of myopia is believed to involve an eye growth signal that compensates for hypermetropic defocusing on the peripheral retina, even in circumstances where good vision is well corrected.
[010]. To correct both foveal and peripheral vision errors, at least two zones of different lens powers are required on the same lens, more specifically, a less constant central power zone or aperture to correct foveal vision, and a relatively more peripheral power zone which surrounds the central zone to correct peripheral vision errors. The size of the central zone, the beginning of the peripheral zone, and the transition between the central zone and the peripheral zone can be varied. For example, the size of the central zone can be adapted according to the typical extension of the usual eye rotation. This may mean, for example, that the central zone may need to have a diameter of between about 10 mm and 20 mm on the lens surface. Typically, 0.5 D to 2.0 D of relatively more power can be provided in the peripheral zone. A proposal to provide the “power transition” between the less constant central power zone and the relatively more peripheral power zone involves providing a “momentary” transition of the type described in international patent publication W02007041796. However, such a transition can have undesirable “double vision” effects for a moving eye.
[011]. An alternative proposal to provide a power transition between the less constant central power zone and the relatively more peripheral power zone involves the provision of a “smooth” spherical design that introduces a transition or progressive power zone between the central and the peripheral zone, as opposed to the provision of "momentary" power transition. For example, it is known to provide a rotationally symmetric transition zone. However, the provision of a rotationally symmetric transition zone can introduce a considerable amount of astigmatism that can cause undesirable astigmatic blur on the peripheral retina.
[012]. The single spherical vision lens described in W02007041796 corrects peripheral hyperopic displacement for both close-up viewing distances. However, hyperopic blur for distance viewing typically extends over the entire width of the lens aperture. On the other hand, the hyperopic blur for close-up view often extends over a smaller opening that corresponds to the angular size of the object being viewed, such as a book. Also, many near vision tasks, such as reading, require a much smaller extent of eye rotation than those for many distance vision tasks. Therefore, it would be expected that lenses to correct peripheral hypermetropic displacement for distance vision would have different requirements to those for correcting peripheral hypermetropic displacement for near vision, in terms of the size of the central zone and the location and extent of the peripheral zone. One way to address the different requirements is to provide two pairs of lenses, one for the requirements of distance vision, the other for the requirements of near vision. However, the provision of two pairs of lenses is often not practical.
[013]. Another proposal involves the provision of an adaptive progressive addition lens. A progressive addition lens provides a relatively large upper viewing zone for remote viewing tasks, a relatively narrow lower viewing zone having a different surface power from the upper viewing zone to obtain a refractive power that corresponds to the vision up close, and an intermediate zone (or corridor) that extends between the upper viewing area and the lower viewing area and provides a progression of power between them. In this regard, US 6,343,861 exposes a progressive addition lens having very little power progression and relatively large upper and lower viewing zones for viewing distant and near objects, respectively.
[014]. International patent application W02008031166 exposes a progressive addition lens having a relatively more power at the lens periphery, which corresponds with the addition power of the lower viewing zone. The lens exposed in the W02008031166 can introduce a myopic shift in the peripheral retina during distance vision tasks. However, it does not provide effective control of the location of the peripheral image during close-up viewing tasks, since the peripheral area of the lower viewing zone, at least in the immediate vicinity of the lower viewing zone, has a lower average refractive power compared to the central portion of the lower viewing zone and thus does not provide the required additional relative power.
[015]. A recent study (Rose et al. 2008, Ophthalmology, Vol.l 15, Issue 8, 1279 - 1285) suggests that adolescents who spend more time away from home, and which, if they are short-sighted, and would suffer in most cases of peripheral hypermetropic displacement in an unconstituted eye, show a relatively low tendency to progression of myopia. It has been suggested that hyperopic defocusing on the periphery of the retina in the presence of positive spherical aberration characterizing a normal relaxed eye may not lead to a significant reduction in contrast to trigger the eye growth mechanism. More specifically, measurements and contrast simulations for different values and signs of defocusing for a relaxed eye by Guo et al. (2008), Vision Res. 48, 1804-181 1 show that positive (myopic) defocusing is more damaging to the contrast on the retina than the hyperopic defocusing typically suffered on the peripheral retina by a relaxed myopic eye. This is thought to be the consequence of the interaction between defocusing and positive spherical aberration of the relaxed eye. It has been suggested that spherical aberration of the eye may provide an indication for detecting the defocusing signal (Wilson et al. 2002, J. Opt. Soc. Am. A 19 (5), 833 - 839). It is also known that the spherical aberration of the accommodated myopic eye becomes negative (Collins et al. 1995, Vision Res. 35 (9), 1157 - 1163). This would lead to a very different effect of hyperopic defocusing on the image contrast in near vision compared to distance vision.
[016]. In view of the above, existing ophthalmic lenses for myopia-correcting glasses, which provide relatively large central zones of constant power, as proposed in WO 2007041796, may thus fail to remove stimuli for the progression of myopia for near vision tasks. It would therefore be desirable to provide a progressive addition lens that compensates for peripheral hyperopic displacement during close-up viewing tasks, while simultaneously providing clear distance viewing over a relatively wide aperture field.
[017]. The discussion of the background for the present invention is included to explain the context of the invention. This should not be construed as an acceptance that any of the referred material that has been published, known or is part of general common knowledge as of the priority date of any of the claims. SUMMARY OF THE INVENTION
[018]. The present invention provides an ophthalmic lens element including an upper viewing zone providing a first refractive power for distance viewing, a lower viewing zone providing an adding power over the first refractive power, and peripheral regions including a respective viewing zone. relatively positive power compared to adding power. The lower viewing area and peripheral regions are arranged in such a way that the lower viewing area interposes with areas of relatively positive power.
[019]. Preferably, the combined horizontal extent of the relatively positive power zones and the lower viewing zone corresponds to a typical horizontal angular extent of the object field for a nearby object, such as a book or magazine.
[020]. In one aspect, the present invention provides a progressive ophthalmic lens element including: an upper viewing zone having a distance reference point and an adjustment cross, the upper viewing zone providing a first refractive power for remote viewing; a lower viewing zone for close-up viewing, the lower viewing zone providing an added power over the first refractive power; a corridor connecting the upper and lower zones, the corridor having a refractive power varying from that of the upper viewing zone to that of the lower viewing zone; and a peripheral region arranged on each side of the lower viewing zone, each peripheral region including a zone of positive power in relation to the addition power to provide a positive refractive power therein in relation to the refractive power of the lower viewing zone; wherein the zones of relative positive power are arranged immediately adjacent to the zone of lower visualization so that the zone of lower visualization is interposed with the zones of relative positive power.
[021]. Preferably, the lower viewing area is a relatively narrow area of low surface astigmatism. In this respect, the lower viewing zone can be defined by 0.5 D astigmatism outlines arranged below a nearby reference point. In one embodiment, the maximum horizontal extent of the lower viewing zone, and thus the maximum distance between the 0.5 D contours of astigmatism, is less than about 12 mm.
[022]. The adding power (or “Add”) will typically be expressed in terms of a desired average added value. An average adding power in the range of 0.50 D to 3.00 D can be used.
[023]. The zones of “relatively positive power” in the peripheral regions, each, provide a relatively positive difference in the refractive power in relation to the first refractive power. The positive difference between the refractive power in the zones of relatively “positive power” in the peripheral regions in relation to the first refractive power is greater than the adding power of the lower viewing zone and thus provides the “positive power” in relation to the adding power . Therefore, the zones of relatively positive power can thus also be considered to provide an addition power which is greater than the add power of the lower display zone.
[024]. The provision of a relatively narrow zone of lower visualization allows each zone of relative positive power to be located in relatively close proximity to a central line extending substantially vertically through the zone of lower visualization, and thus provides relatively narrow combined horizontal extension of the zones of relatively positive power and the lower viewing area. Preferably, the maximum combined horizontal extent of the relatively positive power zones and the lower viewing zone is less than about 30 mm.
[025], Modalities of the present invention can compensate for a peripheral hypermetropic displacement during close-up viewing tasks and thus can provide an optical correction to slow or stop the progression of myopia for a user during close-viewing activities.
[026]. In some embodiments, the lower viewing area may include a nearby landmark. The location of the near reference point (NRP) can be indicated using a mark on a surface of the lens element. However, it is not essential that the lens element includes such a mark.
[027]. Modalities of the present invention can provide an average horizontal or lateral addition power profile along a horizontal line disposed below the close reference point, said line extending through the lower viewing zone and the peripheral regions. The horizontal or lateral average addition power profile can display a respective peak magnitude and each peripheral region and a local minimum magnitude in the lower viewing zone. Preferably, each local minimum magnitude is arranged at the intersection of the horizontal line and a line fitted to a set of horizontal midpoints between nasal and temporal 0.5 D astigmatism contours adjacent to the lower viewing zone. Adjusting the line to the horizontal midpoints may involve appropriate approximation techniques, such as approximating the type of least squares. Other appropriate techniques would be well understood by an expert reader. An adjusted line can be a substantially vertical line, or it can be slanted or tilted to align with the user's eye path.
[028]. The respective peak magnitudes of the average addition power can be laterally separated from a line adjusted between about 10 mm and about 15 mm.
[029]. The first refractive power is typically a prescribed power that corresponds to an optical correction for a user's distance viewing requirements. Thus, for the remainder of the description, references to a "remote viewing area" should be understood as a reference to the upper viewing area. On the other hand, the addition power of the lower viewing zone can be selected to facilitate accommodative demand and the displacement of the image plane at the periphery closest to, or in front of, the retina during close-up viewing tasks. Thus, for the remainder of the description, references to a “close view area” should be understood as a reference to the bottom view area.
[030]. The lower viewing zone will be positioned in the region of the progressive ophthalmic lens element that is likely to be used for close-up viewing. The lower viewing area can be inserted towards the nasal side of the lens in relation to the distance viewing area.
[031]. A progressive ophthalmic lens element according to one embodiment of the present invention can be specifically designed for use by teenagers, since teenagers typically do not have a need for close vision correction due to the availability of the eye's accommodation for viewing objects in the near field. For example, a teenager may be able to use the distance viewing zone to view nearby objects with the help of his accommodation system. However, the inclusion of the lower viewing zone for added power can assist adolescent users to reduce their accommodative demand and thus reduce the central blur on the fovea and parafovea during close viewing tasks due to the accommodative delay. The provision of zones of positive or “additional” relative power, adjacent to the lower viewing zone, can also reduce hypermetropic blur in immediate peripheral vision during close-up viewing tasks, such as reading, where the nearby object occupies a horizontal angular extent relatively large of the user's visual field, and is thus extended in the space of the object. As an example, a cell phone screen, for example, would typically not occupy a wide horizontal angular extension of the user's visual field, and thus is not “extended in the object's space” when compared to, for example, a book or a magazine.
[032]. Accordingly, modalities of the present invention may be more effective in slowing or even stopping the progression of myopia, particularly in children, than previous myopia control lenses.
[033]. The distance viewing zone of the progressive ophthalmic lens element can be designed to be used at less than relatively low to moderate prescribed capacities. It will be appreciated that the refractive power of the distance display zone can vary according to a user's requirements, and can be in the range of, for example, plane up to -6.00 D. a wide range of the base curves can be used for this purpose, including the relatively flat base curves typical for less prescriptions, but also some relatively inclined curves that reduce the lens less of hyperopic displacement induced in peripheral vision. For example, a base curve in the range of 0.50 D to 9.00 D can be used.
[034]. The power distribution of the relatively positive power zones in the peripheral regions can contribute to an optical correction to correct peripheral vision, when the user is viewing objects through the lower viewing zone. In use, the distribution of power can provide a stimulus to slow or stop myopia in the form of a "stop sign" for the undesirable growth of the eye, which slows or stops the progression of myopia.
[035]. Thus, one embodiment of the present invention provides a progressive ophthalmic lens element that provides optical corrections appropriate to a user's distance viewing requirements, on the axis, over a wide range of eye rotations, and which is also capable of reducing accommodative demand for near vision tasks, while simultaneously providing a stop signal to slow or stop the progression of myopia that may otherwise have resulted from constant exposure of the eye to hyperopic smear on the peripheral retina during near vision.
[036]. In one embodiment, the stop signal can compensate for a variation in the focal plane of the user's eye to remove most of the hypermetropic blur from the peripheral region of the retina to a primary close-up viewing position. Thus, it is expected that the distribution of positive power across relatively positive power zones in the peripheral regions of a progressive ophthalmic lens element according to an embodiment of the present invention will provide an optical correction that provides the stop signal for undesirable growth ocular, thus leading to retardation or arrest of myopia on the periphery of the retina.
[037]. A progressive ophthalmic lens element according to an embodiment of the present invention includes a front surface and a rear surface (i.e., the surface closest to the eye). The front and rear surfaces can be shaped to provide appropriate contours of refractive power and astigmatism for the upper viewing area, the lower viewing area and the corridor.
[038]. The front surface and the rear surface of the lens can be of any suitable shape. In one embodiment, the front surface is a spherical surface and the rear surface is spherical or toric. In another embodiment, the front surface is a spherical surface and the rear surface is spherical.
[039]. In yet another embodiment, both the front and rear surfaces are spherical. It will be appreciated that a spherical surface may include, for example, an atomic surface, a progressive surface, or combinations thereof.
[040]. The addition power of the lower viewing zone and the relatively positive power in the peripheral regions will typically correspond to the user's different optical correction requirements. In particular, the addition power will be selected to provide a near power that corresponds to an optical axis, or para-axial, correction required to provide clear vision (ie foveal vision) for a user's near vision tasks. with reduced accommodative demand, while peripheral power can provide an off-axis optical correction when viewing nearby objects through the lower viewing zone.
[041]. The average positive power of each peripheral region can be selected based on optical correction requirements expressed in terms of clinical measurements that characterize the user's peripheral correction requirements, that is, the optical correction required to correct a user's peripheral vision. Any appropriate technique can be used to achieve those requirements, including, but not limited to, peripheral Rx data or Ultrasound-A data. Such data can be obtained through the use of devices that are known in the art, such as an open field auto refractor (for example, an open field auto refractor from Shin-Nippon).
[042]. As explained above, each peripheral region includes a zone that provides a positive power in relation to the addition power of the lower viewing zone and thus also provides a zone of high refractive power in relation to the refractive power of the lower viewing zone. Each zone thus provides a zone of relative positive power that provides "an additional power correction". The positive power, and thus the "correction of additional power" can be in the range of about 0.50 D to 2.50 D in relation to the adding power and thus in relation to the refractive power of the lower viewing zone, which will usually be expressed in terms of the average refractive power at a close reference point (NRP) of the lens element.
[043]. As explained above, the lower viewing zone is preferably a relatively narrow zone. In one embodiment, the bottom viewing zone can be shaped and / or sized to provide a region of low surface astigmatism over the range of eye rotations for viewing tasks close to a user. In other words, the near or bottom viewing zone can be shaped and / or scaled to withstand a user's near vision requirements across an entire angular range of eye rotations.
[044]. The area of the distance viewing area will typically be larger than the area of the lower viewing area.
[045]. A progressive ophthalmic lens element according to an embodiment of the present invention can be formulated from any suitable material. In one embodiment, a polymeric material can be used. The polymeric material can be of any suitable type, for example, it can include a thermoplastic or thermostable material. A material of the diallyl glycol carbonate type, for example, CR-39 (PPG Industries), can be used.
[046]. The polymeric article can be formed from crosslinkable polymeric molding compositions. The polymeric material can include a dye, preferably a photochromic dye, which can, for example, be added to the monomer formulation used to produce the polymeric material.
[047]. A progressive ophthalmic lens element in accordance with an embodiment of the present invention may further include additional standardized coatings on the front or rear surface, including electrochromic coatings.
[048]. The front lens surface may include an anti-reflective (AR) coating, for example of the type described in U.S. Pat. US No. 5,704,692, the entire exposure of which is hereby incorporated by reference.
[049]. The front lens surface may include an abrasion resistant coating, for example, of the type described in U.S. Pat. US No. 4,954,591, the entire disclosure of which is incorporated herein by reference.
[050]. The front and rear surfaces can also include one or more additions conventionally used in molding compositions, such as inhibitors, dyes including thermochromic and photochromic dyes, for example, as described above, polarizing agents, UV stabilizers and materials capable of modifying the refractive index.
[051]. The preferred embodiment of a lens element according to the invention provides an ophthalmic lens element having peripheral regions that include zones of positive average power (i.e., "an additional power correction") in relation to the refractive power of the zone of bottom view.
[052]. The level of additional power correction required by the user will vary, given the large dispersion in the myopic peripheral refractions found by Mutti et al. (2000).
[053]. An ophthalmic lens element according to the present invention can simultaneously and substantially correct both central and peripheral vision during close-up viewing tasks. Correction of this type is expected to remove, or at least delay, a presumed trigger of myopia progression in myopic individuals, particularly in myopic teenagers.
[054]. Another aspect of the present invention provides a method for retarding myopia progression, including providing a patient with glasses carrying a pair of progressive ophthalmic lens elements, each lens element including a surface having: an upper viewing area having a point distance reference and an adjustment cross, the upper viewing zone providing a first refractive power for distance viewing; a lower viewing zone for close-up viewing, the lower viewing zone providing an added power over the first refractive power; a corridor connecting the upper and lower zones, the corridor having a refractive power varying from that of the upper viewing zone to that of the lower viewing zone; and a peripheral region arranged on each side of the lower viewing zone, each peripheral region including a zone of positive power in relation to the addition power to provide a positive refractive power therein in relation to the refractive power of the lower viewing zone; wherein the zones of relative positive power are arranged immediately adjacent to the zone of lower visualization so that the zone of lower visualization is interposed with the zones of relative positive power. BRIEF DESCRIPTION OF THE DRAWINGS
[055]. The present invention will now be described in relation to several examples illustrated in the accompanying drawings. However, it should be appreciated that the detailed description should not limit the generality of the above description.
[056]. In the drawings: figure 1 is a simplified representation of an ophthalmic lens element according to an embodiment of the present invention; figure 2 is a contour trace of surface astigmatism for an ophthalmic lens element according to a first embodiment of the present invention; Figure 3 is a contour plot of medium surface addition power for the ophthalmic lens element of Figure 2; figure 4 is a trace of the average surface addition power for the ophthalmic lens element of figure 2 along an eye path shown in figure 2; figure 5 shows traces of average surface addition power for the ophthalmic lens element of figure 2 along plural horizontal lines shown in figure 3; Figure 6 is a contour trace of surface astigmatism for an ophthalmic lens element according to a second embodiment of the present invention. Figure 7 is a contour plot of medium surface addition power for the ophthalmic lens element of Figure 6; figure 8 is a tracing of average surface addition power for the ophthalmic lens element of figure 6 along an eye path shown in figure 6; figure 9 shows traces of average surface addition power for the ophthalmic lens element of figure 6 along the plural horizontal nails shown in figure 7; figure 10 is a contour trace of surface astigmatism for an ophthalmic lens element according to a third embodiment of the present invention; Figure 11 is a contour plot of medium surface addition power for the ophthalmic lens element of Figure 10; figure 12 is a tracing of average surface addition power for the ophthalmic lens element of figure 10 along an eye path shown in figure 10; Figure 13 shows traces of average surface addition power for the ophthalmic lens element of Figure 10 along the horizontal plural nails shown in Figure 11. Figure 14 is a contour trace of surface astigmatism for an ophthalmic lens element according to a fourth embodiment of the present invention; Figure 15 is a contour plot of medium surface addition power for the ophthalmic lens element of Figure 14; figure 16 is a tracing of average surface addition power for the ophthalmic lens element of figure 14 along an eye path shown in figure 14; Figure 17 shows traces of average surface addition power for the ophthalmic lens element of Figure 14 along plural horizontal lines shown in Figure 15; figure 18 is a contour trace of surface astigmatism for an ophthalmic lens element according to a fifth embodiment of the present invention; Figure 19 is a contour plot of medium surface addition (digression) power for the ophthalmic lens element of Figure 18; figure 20 is a tracing of average surface addition (digression) power for the ophthalmic lens element of figure 18 along an eye path shown in figure 18; and figure 21 shows traces of average surface addition (digression) power for the ophthalmic lens element of figure 18 along plural horizontal lines shown in figure 19. DETAILED DESCRIPTION OF THE DRAWINGS
[057]. Before going back to the description of the modalities of the present invention, some explanation of some of the languages used above and throughout the description must be given.
[058]. For example, the reference in this description to the term “progressive ophthalmic lens element” is a reference to all of the forms of individual refractive optical bodies employed in ophthalmic techniques, including, but not limited to lenses, lens wafers and parts in semi-finished lens blanks that require another finish for a patient's particular prescription.
[059]. Still, with regard to references to the term “surface astigmatism”, such references should be understood as a reference up to a measure of the degree to which the curvature of the lens varies, among the intersection planes that are normal to the lens surface in a point on the surface. Surface astigmatism is equal to the difference between the minimum and maximum curvatures of the lens surface on any of those intersection planes multiplied by (n-1), where n is the reference refractive index.
[060]. References to the term “adjusting cross” should be understood as a reference to a marking located at a point on a surface of a lens element or a semi-finished lens blank, which is stipulated by the manufacturer as a reference point for positioning the lens element in front of the wearer's eye.
[061]. References to the term “distance reference point” (DRP) should be understood as a point on the front surface of the lens where the refractive power for distance vision applies.
[062]. References to the term “near reference point” (NRP) should be understood as a reference at the “highest” point (that is, the point most vertically displaced towards the geometric center of the lens) along the eye path on the surface front of the progressive lens where the required average adding power can be measured. The NRP can be marked or designated by a marking on the lens surface. However, it is not essential that such a marking or designation is provided.
[063]. References to the term “eye path” should be understood as referring to a location of visual fixation that, when the lens element is correctly designed for the user, typically coincides with a location of horizontal midpoints between 0.5 astigmatism contours Nasal and temporal D when the user adjusts its fixation from a distant object (far field) to a nearby object (near field).
[064]. References to the term “lower viewing zone” should be understood as referring to a zone of low astigmatism located below the nearest reference point. Typically, the lower viewing area will be defined by 0.5 D outlines of astigmatism arranged below the nearby reference point.
[065]. Figure 1 illustrates a simplified representation of an ophthalmic lens element 100 according to an embodiment of the present invention with the different zones identified for reference. Figure 1 is simplified in that it is only intended to identify and generally represent the relative locations of the different zones of the ophthalmic lens element 100 using 0.5 D 116, 118 astigmatism outlines. It should be appreciated that neither the shape of the different zones, nor their precise size or location, need to be restricted to those illustrated in figure 1.
[066]. The ophthalmic lens element 100, shown in figure 1, includes a first upper viewing zone or zone 102 having a first refractive power suitable for viewing tasks at a user's distance, and a second lower viewing zone or zone 104 providing a adding power for the first refractive power. A distance reference point (DRP) is provided in the upper viewing area 102. A close reference point (NRP) is provided in the lower viewing area 104. The lens element also includes an adjustment cross (FC) 110 and a geometric center (GC) 112.
[067]. A corridor 106 connects the upper viewing area 102 and lower 104. The corridor 106 provides a zone of low surface astigmatism having a refractive power that varies from that of the distance viewing area 102 to that of the lower viewing area 104. In the In this example, the corridor extends between the distance reference point (DRP) and the nearby reference point (NRP). A line 114 (shown dashed) extends downward from the near NRP reference point. In the present case, line 114 is an adjusted line that is adjusted to the horizontal midpoints between the nasal and temporal 0.5 D astigmatism contours 116, 118 adjacent to the lower viewing area 104. In the present case, line 114 is shown as a vertical line. However, it will be appreciated that line 114 can be slanted or tilted to align with the user's eye path.
[068]. The lower zone or near viewing area 104 is positioned to be suitable for viewing tasks close to a user. The addition power of the lower viewing zone 104 at the near reference point (NRP) can provide a reduced accommodative demand when viewing nearby objects through this zone 104. The lower viewing zone 104 can thus reduce the accommodative demand for tasks near vision and provides an amount of compensation for relative hyperopic displacement in peripheral near vision.
[069]. In the illustrated embodiment, the lens element 100 also includes peripheral regions 108 arranged on either side of the lower viewing area 104 so as to be located immediately adjacent to it. Each peripheral region 108 includes a respective zone 120, 122 of positive power in relation to the addition power of the lower display zone 104. The lower display zone 104 interposes with the peripheral regions 108, and thus the respective power zones 120, 122 relative positive.
[070]. Each relative positive power zone 120, 122 has an average addition power distribution that provides an optical correction to delay or deter myopia for a user and that is appropriate for a user's near-peripheral vision requirements. Each relative positive power zone 120, 122 will typically exhibit a low to medium positive power range relative to the addition power of the lower display zone 104. Each relative positive power zone 120,122 is disposed immediately adjacent to the lower display zone 104. The upper viewing area 102, the lower viewing area 104, and the corridor 106 will typically have relatively low surface astigmatism compared to the surface astigmatism of peripheral regions 108.
[071]. Zones 120, 122 of relative positive power in peripheral regions 108 provide a stimulus to delay or deter myopia associated with a peripheral region of the retina by providing an optical correction for the user's peripheral vision. Such an arrangement may be more effective in slowing or even stopping myopia progression, particularly in children, than conventional myopia control lenses. The average positive power in zones 120, 122 of relative positive power in peripheral regions 108 can be selected based on optical correction requirements expressed in terms of clinical measurements that characterize the user's peripheral correction requirements, that is, the optical correction required to correct a user's peripheral vision. Any appropriate technique can be used to achieve those requirements, including, but not limited to, peripheral Rx data or Ultrasound-A scan data. Such data can be obtained through the use of devices that are known in the art, such as an open field auto refractor (for example, an open field auto refractor from Shin-Nippon). Example 1
[072]. Figure 2 is a contour trace of surface astigmatism for the front surface (i.e., the side of the object) of an ophthalmic lens element 200 according to one embodiment. Figure 3 is a contour trace of the average surface addition power for the front surface of the ophthalmic lens element 200.
[073]. With reference to figure 2 and figure 3, the ophthalmic lens element 200 was designed having a base curve of 2.75D at the index of 1.530 measured at the distance reference point (DRP), shown here as located in the center of part circle 202. The geometric center (GC) for lens element 200 is identified at point 214. The adjustment cross (FC) is designated with a marking 206 (shown here as a cross). Semicircle 208 is centered on the near reference point (NRP).
[074]. The ophthalmic lens element 200, shown in figure 2 and figure 3, is a front-surface progressive addition lens having a distance reference point (DRP) located approximately 8 mm above the geometric center (GC) 214, and an adjustment cross (FC) 206 located approximately 4 mm above the geometric center 214. The diameter of the contour strokes is 60 mm on a front lens surface projected in a plane perpendicular to a front lens surface normal to the geometric center 214 .
[075]. As shown in figure 2, the astigmatic contours of 0.5 D 210, 212 define a region of low surface astigmatism including the upper zone or distance viewing zone 102, the lower zone or close viewing zone 104, and the corridor 106. The ophthalmic lens element 200 provides a relatively wide upper viewing area 102, and a relatively narrow lower viewing area 104 positioned below the upper viewing area 102 and connected to it via corridor 106. Peripheral regions 108 are arranged in each side of, and immediately adjacent to, the lower viewing area 104 so that the lower viewing area 104 interposes the zones of relative positive power. As will be explained below, each peripheral region 108 includes a zone of positive power in relation to the addition power.
[076]. The ophthalmic lens element 200 provides a nominal addition power of + 1.00D in the lower viewing area 104 from a distance of approximately 9 mm below the geometric center 214 (GC). The near reference point (NRP) is inserted horizontally by approximately 2.1 mm nasally in relation to the geometric center 214 (GC), the adjustment cross (FC) and the distance reference point (DRP).
[077]. Figure 4 is a trace of the average front surface addition power along an eye path marked by the approximately vertical line 216 over the astigmatism contour line shown in Figure 2. In the present case, line 216 is a line fitted to the horizontal midpoints between the 0.5 D 210, 212 astigmatic contours adjacent to the lower viewing zone 104. Note that the average addition power above the distance reference point (DRP) and below the near reference point (NRP) it is not constant in order to ensure stable optical properties through power or capacity in those zones for the prescription of -2.50 D with the addition of +1.00 D, a rear lens apex point being 27 mm from the center of eye rotation and a pantoscopic lens tilt angle on the adjustment cross being at 7o in relation to the vertical plane, while the horizontal tilt angle at the FC was equal to 0o.
[078]. Figure 5 shows the average addition powers of the horizontal front surface for a sequence and six straight horizontal lines 218-1, 218-2, 218-3, 218-4, 218-5, 218-6 shown (dashed) in the figure 3 extending 20 mm on either side of the section of line 216 extending through the lower viewing area 104, and thus extending through the lower viewing area 104 and the peripheral regions 108 of the lens element 200.
[079]. As shown in figure 5, along each line 218-1, 218-2, 218-3, 218-4, 218-5, 218-6 (see figure 5) the ophthalmic lens element 200 displays a respective average adding power profile that includes a respective peak magnitude and each peripheral region 108 and a local minimum magnitude that is substantially disposed on line 216 (at X = 2.1 mm). Each average adding power profile exhibits a monotonic increase in magnitude from the local minimum magnitude to the respective peak magnitudes.
[080]. Although in this example the straight horizontal line sequences 218-1, 218-2, 218-3, 218-4, 218-5, 218-6 are located below the near reference point (NRP), it is possible that a similar profile medium addition power can be provided along a horizontal line intercepting the near reference point (NRP) and extending a pre-defined distance through the lower viewing zone 104 and the peripheral regions 108, in which case the magnitude Local minimum will be located at the nearby reference point (NRP).
[081]. The straight nail string is placed vertically at 10 mm (218-1), 11 mm (218-2), 12 mm (218-3), 13 mm (218-4), 14 mm (218-5) and 15 mm (218-6) below the geometric center (GC), meaning that Nail 218-6 is thus located 23 mm below the distance reference point (DRP) of lens element 200.
[082]. As shown in figure 5, the respective average horizontal profile adding powers show an increase in average adding power both temporally and nasally in the distances (Y) between -10 mm and -15 mm below the geometric center (GC). It is also clear from figure 3 that this tends to mean that the peripheral average power always extends to the base of the ophthalmic lens element 200.
[083]. At the highest end of this band (that is, Y = -10 mm, corresponding to Nail 218-1), the average addition power increases by about 0.5 D (in relation to the corresponding power over the eye path represented by the Nail 216) at a horizontal distance of approximately 11 mm from the intersection of Nail 218-1 and Adjusted Nail 216 (see figure 2) representing the eye path, while at the lower end of the band (ie, Y = -15 mm , corresponding to Nail 218-6), the average addition power increases by up to 1.25 D (in relation to the corresponding power over the eye path represented by line 216) in the horizontal distance of approximately 14 mm from the intersection of Nail 218 -6 and the adjusted line 216 (see figure 2) representing the eye path. In the present example, the respective peak magnitudes in average addition power are laterally separated by between about 22 mm (line 218-1) and about 27 mm (line 218-6). Example 2
[084]. Figure 6 is a contour trace of surface astigmatism for the front surface (i.e., the side of the object) of an ophthalmic lens element 300 according to a second embodiment of the present invention. Figure 7 is a contour plot of medium surface addition power for the front surface of the ophthalmic lens element 300 shown in Figure 6.
[085]. The ophthalmic lens element 300 shown in figure 6 and figure 7 is also a progressive lens with a front surface having the same location as the middle reference points (DRP, FC and NRP) in relation to a geometric center (GC), such as the element ophthalmic lens 200 of the example described above.
[086]. The ophthalmic lens element 300 also has the same 2.75 D base curve (at the index of 1.530) at the distance reference point (DRP). Thus, with reference to figure 6 and figure 7, it is evident that the ophthalmic lens element 300 is generally similar to the ophthalmic lens 200 described with reference to figure 2 and figure 3. For example, the ophthalmic lens element 200 and the ophthalmic lens element 300 each includes a relatively short aisle 106, sphering of the top 102 and bottom 104 viewing zones above DRP 304 and below NRP 306, and by means of a surface rising laterally from a line 302 adjusted to the horizontal midpoints between the nasal and temporal 0.5 D astigmatism contours 210/212 adjacent to the lower viewing area 104. In this example, the addition power of the lower viewing area 104 is also +1.00 D. However, the lower viewing area 104 of the ophthalmic lens element 300 is narrower than the lower viewing area 104 of the ophthalmic lens element 200 with the horizontal distance between the peaks of positive or “additional” relative power along line 308-6 in figure 9 being around 22 mm.
[087]. Figure 8 is a plot of average front surface addition power along an eye path marked by the approximately vertical line 302 over the astigmatism contour plot shown in Figure 6.
[088]. Figure 9 shows the average horizontal front surface addition powers for a sequence and six straight horizontal lines 308-1, 308-2, 308-3, 308-4, 308-5, 308-6 shown (dashed) in the figure 7, extending 20 mm on either side of the section of line 302 extending through the lower viewing area 104, and thereby extending through the lower viewing area 104 and the peripheral regions 108 of the lens element 300. The strings of straight lines are placed vertically at 10 mm (308-1), 11 mm (308-2), 12 mm (308-3), 13 mm (308-4), 14 mm (308-5) and 15 mm (308-6) below the geometric center (GC), meaning that line 308-6 is thus located 23 mm below the distance reference point (DRP) of lens element 300.
[089]. In addition to the difference in the width of the lower viewing zone, and with reference now to figure 8 and figure 9, other differences from the example described above include the extent and magnitude of the power relatively more laterally from the vertical midline 302 of the zone bottom view 104. For example, as shown in figure 9 at the height of Y = -10 mm (see figure 7, line 308-1), the maximum relative additional power in the peripheral regions 108 laterally occurs around 9 mm from the eye path represented by line 302 and with the magnitude of 0.5 D. At the lower end of the Y-band = -15 mm (see figure 7, line 308-6) the magnitude of the relative positive power is around +1 .1 From around 11 mm from the eye path.
[090]. The ophthalmic lens element 300 thus has the same added power as the previous example, but includes a "tighter" zone over which the peripheral close view has compensation for hyperopic displacement. In other words, the lateral separation between the peak magnitudes in the adding power profile (see figure 9) and each peripheral region 108 is reduced in comparison to the lateral separation between the corresponding peak magnitudes in the adding power profile (see figure 5) for lens element 200. For example, on lens element 300 to 15 mm (see figure 3, line 308-6) below the geometric center (GC), the lateral separation between the respective peak magnitudes in average adding power is about 22 mm (see figure 9, profile for line 308-6), while the corresponding respective peak magnitudes in average adding power for the lens element 200 are laterally 27 mm apart (see figure 5, profile 218-6). Both the ophthalmic lens element 200 and the ophthalmic lens element 300 are designed to provide nominal addition power in index material 1.6. Example 3
[091]. Figure 10 is a contour trace of surface astigmatism for the front surface (i.e., the object-side surface) of an ophthalmic lens element 400 according to a third embodiment of the present invention. Figure 11 is a contour plot of medium surface addition power for the front surface of the ophthalmic lens element 400 shown in Figure 6.
[092]. The ophthalmic lens element 400 shown in figure 10 and figure 11 is also a progressive lens with a front surface having the same location as the middle reference points (DRP, FC and NRP) in relation to a geometric center (GC) as the ophthalmic lens 200 of the example described above.
[093]. Ophthalmic lens element 400 also has the same 2.75 D base curve (at the index of 1.530) at distance reference point 402 (DRP). Thus, with reference to figure 10 and figure 11, it is evident that the ophthalmic lens element 400 is generally similar to the ophthalmic lens 200 described with reference to figure 2 and figure 3. For example, the ophthalmic lens element 200 and the ophthalmic lens elements 400 each include a relatively short aisle 106, sphering of the top 102 and bottom 104 viewing zones above DRP 402 and below NRP 404, and laterally increasing average surface power from a line 406 adjusted to the horizontal midpoints between the nasal and temporal 0.5 D astigmatism contours 210/212 adjacent to the lower viewing area 104. However, in this example, the addition power of the lower viewing area 104 is approximately +1.50 D.
[094]. Figure 12 is a plot of average front surface addition power along an eye path marked by the approximately vertical line 406 over the astigmatism contour plot shown in Figure 10.
[095]. Figure 13 shows the average addition powers of the horizontal front surface for a sequence and six straight horizontal lines 408-1, 408-2, 408-3, 408-4, 408-5, 408-6 shown (dashed) in the figure 11 extending 20 mm on either side of the section of line 406 extending through the lower viewing area 104, and thus extending through the lower viewing area 104 and the peripheral regions 108 of the lens element 400. The strings Straight nails are placed vertically at 10 mm (408-1), 11 mm (408-2), 12 mm (408-3), 13 mm (408-4), 14 mm (408-5) and 15 mm ( 408-6) below the geometric center (GC), meaning that line 408-6 is thus locafized at 23 mm below the distance reference point (DRP) of lens element 400.
[096]. In addition to the difference in adding power, and with reference now to figure 12 and figure 13, other differences from the example described above include the extent and magnitude of the power relatively more laterally from the vertical midline 406 of the lower viewing zone 104 For example, as shown in figure 9 at the height of Y = -10 mm (ref. To figure 13, line 408-1), the maximum relative additional power in the peripheral regions 108 laterally occurs around 10 mm from the ocular path and with the magnitude of 0.5 D. At the lower end of the Y-band = - 15 mm (see figure 13, line 408-2) the magnitude of the relative positive power is around +1 .1 D and also occurs around 10 mm from the eye path.
[097]. The ophthalmic lens element 400 thus has a relatively higher addition power than the two preceding examples and a “tighter” zone over which the near-peripheral view is compensated for hyperopic displacement compared to example 1. In this example, as shown in figure 13, the lateral separation between the locations of the positive or “additional” positive relative power along line 408-6 is about 21 mm compared to 27 mm along a corresponding nail 218- 6 (see figure 5) in example 1. The adding power is 1.5 D compared to 1.0 D in example 1. Both the ophthalmic lens element 200 and the ophthalmic lens element 400 are designed to provide nominal addition power in index material 1.6. Example 4
[098]. Figure 14 is a contour trace of surface astigmatism for the front surface (i.e., the object-side surface) of an ophthalmic lens element 500 according to a fourth embodiment of the present invention. Figure 15 is a contour plot of medium surface addition power for the front surface of the ophthalmic lens element 500 shown in Figure 14.
[099]. The ophthalmic lens element 500 shown in figure 14 and figure 15 is a progressive front surface with a short corridor length (DRP to NRP of 17 mm, FC to NRP of 13 mm). The ophthalmic lens element 500 has the same 2.75D base curve at the 1.530 index as in the examples described above. However, the ophthalmic lens element 500 shown in figure 14 and figure 15 provides an addition power of +2.0 D in the material index of 1.6.
[0100]. Figure 16 is a plot of average front surface addition power along an eye path marked by the approximately vertical line 506 over the astigmatism contour line shown in Figure 10.
[0101]. Figure 17 shows the average horizontal front surface addition powers for a sequence and six straight horizontal lines 508-1, 508-2, 508-3, 508-4, 508-5, 508-6 shown (dashed) in the figure 15 extending 20 mm on either side of the section of line 506 extending through the lower viewing area 104, and thus extending through the lower viewing area 104 and the peripheral regions 108 of the lens element 500. The strings straight lines are placed vertically at 10 mm (508-1), 11 mm (508-2), 12 mm (508-3), 13 mm (508-4), 14 mm (508-5) and 15 mm ( 508-6) below the geometric center (GC), meaning that Nail 508-6 is thus located 23 mm below the distance reference point (DRP) of lens element 500.
[0102]. As shown in figure 17, the peak magnitude of the relatively positive power in the peripheral regions 108, and thus the peripheral close view plus power compensation of this 500 lens element, reaches up to approximately + 1.5D on both nasal sides and temporal at Y = -15 mm (see figure 15, line 508-2) and extends out to about 13 mm to 14 mm on either side of the substantially vertical line 506 adjusted to the horizontal midpoints between astigmatism contours of nasal and temporal 0.5 D adjacent to the lower viewing area 104. Example 5
[0103]. The ophthalmic lens elements described in the examples above are progressive addition lens elements having a complex surface, in the form of a progressive power surface, on the front (i.e., the object side) of the lens element and a simple surface , in the form of a spherical surface, at the rear (that is, the object side) of the lens element. However, it is also possible that other embodiments of the present invention may provide progressive addition lens elements having a progressive power surface at the rear (i.e., the eye side) of the lens element. Alternatively, optical lens elements according to other embodiments of the present invention may include progressive addition lens elements that provide a split of power progression between the front and rear surfaces with both surfaces contributing to the provision of added power.
[0104]. Figure 18 is a contour trace of surface astigmatism for the rear surface (i.e., the eye side surface) of an ophthalmic lens element 600 according to a fifth embodiment of the present invention.
[0105]. Figure 19 is a contour trace of medium surface addition power to the rear surface of the ophthalmic lens element 600 shown in Figure 18. In the lens element 600, the progressive surface is arranged on the surface of the rear (side of the eye) ) of the lens element 600, while the front surface is spherical.
[0106]. Figure 20 is a trace of the average addition power (digression) of the rear surface along an ocular path marked by the approximately vertical nail 606 over the astigmatism contour trace shown in figure 18.
[0107]. Figure 21 shows the average horizontal rear surface (digression) power profiles for a sequence and six straight horizontal lines 608-1, 608-2, 608-3, 608-4, 608-5, 608-6 shown (dashed) in figure 19, which extend 20 mm on either side of the section of Nail 606 that extends through the lower viewing area 104, and thus extending through the lower viewing area 104 and the peripheral regions 108 of the element lens 600. The straight line strings are placed vertically at 10 mm (608-1), 11 mm (608-2), 12 mm (608-3), 13 mm (608-4), 14 mm (608- 5) and 15 mm (608-6) below the geometric center (GC), meaning that Nail 608-6 is thus located 23 mm below the distance reference point (DRP) of the lens element 600.
[0108]. The lens element 600 is substantially similar to the lens element 300 (see figure 6) described in relation to example 2, at least in terms of its optical characteristics, except that the location of the complex surface (i.e., the progressive surface ) and the simple surface (that is, the spherical surface) are reversed. Because the optical effect pro vid by the lens element 300 (see figure 6) and the lens element 600 is substantially the same, in the used position of the lens element 600 and lens element 300 can be virtually indistinguishable for the user and would each provide substantially the same addition power and relative peripheral additional power.
[0109]. In this example, the ophthalmic lens element 600 has a 3.00 D rear surface curve (at the index of 1.530) at distance reference point 602 (DRP). As can be seen in figure 20, the lower viewing area 104 of that ophthalmic lens has a power shift on the rear surface (on the side of the eye) of lens element 600. Such a power shift provides added power when viewing through the lens element 600 which has a spherical front surface and a complex digressive rear surface.
[0110]. As shown in figure 21, the addition power in the lower viewing area 104 and the positive or “additional” relative power in the peripheral regions 108 adjacent to the lower viewing area 104 of this lens is substantially similar to that provided by lens element 300 (ref. to figure 6), but it is obtained with a different surface configuration. For example, the peripheral regions 108 adjacent to the lower viewing area 104 on the rear surface show a less relative surface on the rear (eye-side) surface of the lens element.
[0111]. Modality of the present invention can provide an additional power compensation for near-peripheral vision that corrects peripheral hypermetropic displacement during near-vision tasks and thus reduces or prevents the progression of myopia.
[0112]. Although the above embodiments have been described in terms of progressive ophthalmic lens elements, it will be appreciated that the present invention can also be applied to other forms of multifocal lens elements, such as bifocal lens elements. Finally, it will be understood that there may be other variations and modifications to the configurations described here, which are also within the scope of the present invention.

权利要求:
Claims (12)
[0001]
1. Ophthalmic lens element, said ophthalmic lens element being either a progressive ophthalmic lens element or a multifocal ophthalmic lens element, said ophthalmic lens element including: an upper viewing zone providing a first refractive power for distance vision; a lower viewing area providing added power over the first refractive power, the lower viewing area including a close reference point, where when the ophthalmic lens element is a progressive ophthalmic lens element, the lower viewing area it is defined by 0.5 D outlines of astigmatism arranged below the nearest reference point; and peripheral regions including a respective zone of relatively positive power compared to the addition power to provide a positive refractive power therefrom in relation to the refractive power of the lower viewing zone; in which the lower viewing area and peripheral regions are arranged in such a way that the lower viewing area interposes with areas of relatively positive power, characterized by the fact that: along any horizontal line disposed below the nearest reference point and extending across the lower viewing zone and peripheral regions, the ophthalmic lens element exhibits a positive average power profile including a respective peak magnitude in each peripheral region and a minimum local magnitude in the lower viewing zone, and each average addition power profile exhibits a monotonic increase in magnitude from the local minimum magnitude to the respective peak magnitudes in each peripheral region.
[0002]
2. Ophthalmic lens element according to claim 1, characterized by the fact that the ophthalmic lens element is a progressive ophthalmic lens element that includes a corridor connecting the upper and lower zones, the corridor having a refractive power varying from that of the upper viewing area to that of the lower viewing area.
[0003]
3. Ophthalmic lens element according to claim 2, characterized by the fact that it is a progressive ophthalmic lens element, in which the upper viewing zone has a distance reference point and an adjustment cross, and in which at the along any horizontal line at least 18 mm below the distance reference point and extending across the lower viewing zone and peripheral regions, the lens element exhibits a positive average addition power profile that includes a respective magnitude of peak and each peripheral region and a minimum magnitude in the lower viewing zone.
[0004]
4. Ophthalmic lens element according to claim 2, characterized by the fact that it is a progressive ophthalmic lens element, in which the respective peak magnitudes are displaced laterally from a nail adjusted to the horizontal midpoints between astigmatism contours of 0.5 nasal and temporal D adjacent to the lower viewing area, said displacement being less than 15 mm.
[0005]
5. Ophthalmic lens element according to claim 3 or 4, characterized by the fact that it is a progressive ophthalmic lens element, in which the average addition power profile along a horizontal line 18 mm below the reference point of distance displays respective peak magnitudes of at least 0.5 D greater than the addition power.
[0006]
Ophthalmic lens element according to any one of claims 3 to 5, characterized by the fact that it is a progressive ophthalmic lens element, in which the average addition power profile along a horizontal line 23 mm below the point of Distance reference displays respective peak magnitudes of at least 0.5 D greater than the addition power.
[0007]
Ophthalmic lens element according to any one of claims 3 to 6, characterized by the fact that it is a progressive ophthalmic lens element, in which the average addition power profile along a horizontal line 23 mm below the point of Distance reference displays respective peak magnitudes of at least 1.0 D greater than the addition power.
[0008]
8. Ophthalmic lens element according to claims 2 to 7, characterized by the fact that it is a progressive ophthalmic lens element, in which the distance reference point is located 8 mm above the geometric center of the lens.
[0009]
Ophthalmic lens element according to any one of claims 5 to 8, characterized by the fact that it is a progressive ophthalmic lens element, in which the respective peak magnitudes are laterally separated by at least 20 mm.
[0010]
10. Ophthalmic lens element according to claim 2, characterized by the fact that it is a progressive ophthalmic lens element in which, within each zone of relatively positive power, the magnitude of the relatively positive power increases monotonically laterally over a horizontal extent that extends from a line adjusted to the horizontal midpoints between nasal and temporal 0.5 D astigmatism contours adjacent to the lower viewing zone to a peak magnitude that is at least 0.5 D greater than the addition power in intersection of the adjusted nail and the horizontal nail.
[0011]
11. Ophthalmic lens element according to claim 10, characterized by the fact that it is a progressive ophthalmic lens element, in which the horizontal extension is less than 15 mm.
[0012]
12. Method for delaying myopia progression which includes providing a patient with glasses carrying a pair of progressive ophthalmic lens elements, each lens element including a surface having: an upper viewing area having a distance reference point and an adjustment cross, the upper viewing zone providing a first refractive power for distance viewing; a lower viewing area for close-up viewing, the lower viewing area providing added power over the first refractive power, the lower viewing area including a close reference point, where the lower viewing area is defined by contours 0.5 D astigmatism arranged below the nearest reference point; a corridor connecting the upper and lower zones, the corridor having a refractive power varying from that of the upper viewing zone to that of the lower viewing zone; and a peripheral region arranged on each side of the lower viewing zone, each peripheral region including a zone of positive power in relation to the addition power to provide a positive refractive power therein in relation to the refractive power of the lower viewing zone; in which the zones of relative positive power are arranged immediately adjacent to the zone of inferior visualization so that the zone of inferior visualization is interposed to the zones of relative positive power, characterized by the fact that: along any horizontal line disposed below the point of close reference and extending across the lower viewing zone and peripheral regions, the ophthalmic lens element exhibits a positive average addition power profile including a respective peak magnitude in each peripheral region and a local minimum magnitude in the viewing zone lower, and each average addition power profile exhibits a monotonic increase in magnitude from the local minimum magnitude to the respective peak magnitudes in each peripheral region.

类似技术:

公开号 | 公开日 | 专利标题

BR112012010883B1|2020-11-17|ophthalmic lens element, and, method for retarding myopia progression

KR101444480B1|2014-09-24|Refractive optical body for progressive ophthalmic lens and method of designing it

US8540365B2|2013-09-24|Ophthalmic lens element

US7413303B2|2008-08-19|Ophthalmic lens

BRPI0214533B1|2020-03-17|PROGRESSIVE OPHTHALMIC LENS ELEMENT, SERIES OF PROGRESSIVE OPHTHALMIC LENS ELEMENTS AND METHOD OF DESIGNING A PROGRESSIVE OPHTHALMIC LENS ELEMENT

BRPI0617356B1|2018-02-14|“Ophthalmic Lens Element, Method and System for Dispensing or Designing an Ophthalmic Lens Element to Correct Myopia in an Eye of the User”

BRPI0621241A2|2011-12-06|progressive multifocal ophthalmic lens, visual device, method for correcting the vision of a presbyopic individual and method for fitting a lens

US7364292B2|2008-04-29|Method of designing progressive power lens group

BRPI0620000A2|2011-12-06|method for determining an ophthalmic lens

US8857990B2|2014-10-14|Device and process for progressive addition lens design

US6412947B2|2002-07-02|Progressive-power multifocal lens

BR112021008327A2|2021-08-03|progressive ophthalmic lens

BRPI0412953B1|2017-08-29|A method for the determination of an ophthalmic lens by using a preselection of astigmatism for the near vision and for the near vision and lens obtained

同族专利:

公开号 | 公开日

US8833936B2|2014-09-16|

AU2010314756A1|2012-05-17|

JP2013510331A|2013-03-21|

EP2499536B1|2019-10-30|

MY163440A|2017-09-15|

CA2779675A1|2011-05-12|

JP5851411B2|2016-02-03|

KR20120115231A|2012-10-17|

CN102713729B|2016-04-27|

EP2499536A4|2016-11-30|

US20120257161A1|2012-10-11|

HK1171265A1|2013-03-22|

KR101781232B1|2017-09-25|

AU2010314756B2|2013-08-29|

BR112012010883A2|2018-03-06|

CA2779675C|2017-07-25|

CN102713729A|2012-10-03|

WO2011054058A1|2011-05-12|

EP2499536A1|2012-09-19|

引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

GB8528460D0|1985-11-19|1985-12-24|Sola Int Holdings|Multifocal lens|

US4954591A|1987-11-06|1990-09-04|Pilkington Visioncare Holdings, Inc.|Abrasion resistant radiation curable coating for polycarbonate article|

US5704692A|1995-08-01|1998-01-06|Rockwell Heavy Vehicles Systems, Inc.|Method of welding a sensor bracket to an axle|

US6343861B1|1998-06-12|2002-02-05|Sola International Holdings, Ltd.|Myopia lens|

WO2000062116A1|1999-04-13|2000-10-19|Hoya Corporation|Progressive refractive power glasses lens and design method therefor|

US7604349B2|1999-07-02|2009-10-20|E-Vision, Llc|Static progressive surface region in optical communication with a dynamic optic|

CA2386062A1|1999-10-01|2001-04-12|Michael Alan Morris|Progressive lens|

US6709105B2|2001-04-10|2004-03-23|Johnson & Johnson Vision Care, Inc.|Progressive addition lenses|

EP1461662B1|2001-12-05|2014-05-14|Carl Zeiss Vision Australia Holdings Ltd.|Balanced progressive lens|

US7503655B2|2003-11-19|2009-03-17|Vision Crc Limited|Methods and apparatuses for altering relative curvature of field and positions of peripheral, off-axis focal positions|

WO2007041796A1|2005-10-12|2007-04-19|Carl Zeiss Vision Australia Holdings Limited|Ophthalmic lens element for myopia correction|

FR2893151B1|2005-11-08|2008-02-08|Essilor Int|OPHTHALMIC LENS.|

FR2894038B1|2005-11-29|2008-03-07|Essilor Int|OPHTHALMIC LENS.|

KR101166623B1|2006-01-12|2012-07-18|인스티튜트 포 아이 리서치 리미티드|Method and apparatus for controlling peripheral image position for reducing progression of myopia|

WO2008031366A1|2006-09-13|2008-03-20|Siemens Aktiengesellschaft|Printed circuit board, particularly ceramic circuit board|

AU2007295957B2|2006-09-15|2012-06-14|Carl Zeiss Vision Australia Holdings Limited|Ophthalmic lens element|

FR2916864B1|2007-05-31|2010-01-08|Essilor Int|MYOPIA CORRECTION PROGRESSIVE OPHTHALMIC GLASS AND METHOD OF MAKING SUCH A GLASS|

US8256895B2|2008-02-20|2012-09-04|Swissphonics Sa|Progressive multifocal ophthalmic lenses identically optimized over a wide range of refractive indices, base curves, and additions|WO2011143538A1|2010-05-14|2011-11-17|Beth Israel Deaconess Medical Center|Extracorporeal devices and methods of treating complications of pregnancy|

US9256083B2|2011-09-22|2016-02-09|Ocular Technology Inc.|Multi-focal lens|

US9201250B2|2012-10-17|2015-12-01|Brien Holden Vision Institute|Lenses, devices, methods and systems for refractive error|

US9541773B2|2012-10-17|2017-01-10|Brien Holden Vision Institute|Lenses, devices, methods and systems for refractive error|

CN102830503A|2012-07-26|2012-12-19|苏州苏大明世光学有限公司|Universal progressive multi-focal lens and die|

CN103777368B|2014-01-16|2018-09-14|段亚东|A kind of wide visual field myopic peripheral defocus spectacle lens|

WO2016050613A1|2014-09-30|2016-04-07|Essilor International |A spectacle ophthalmic lens, method for determining a spectacle ophthalmic lens|

EP3276399A1|2016-07-29|2018-01-31|Essilor International|Method for determining a progressive ophthalmic lens for myopic wearers|

TW201812392A|2016-08-01|2018-04-01|華盛頓大學|Ophthalmic lenses for treating myopia|

EP3330777A1|2016-12-01|2018-06-06|Carl Zeiss Vision International GmbH|Progressive ophthalmic lens, method of manufacturing a progressive spectacle lens and method of designing a progressive spectacle lens|

EA033949B1|2017-07-03|2019-12-12|Карл Цайсс Вижн Интернэшнл Гмбх|Progressive spectacle lens, method of manufacturing a progressive spectacle lens and method of designing a progressive spectacle lens|

BR112019000673B1|2016-12-01|2020-11-24|Carl Zeiss Vision International Gmbh|PROGRESSIVE SUNGLASSES LENS, METHOD FOR MANUFACTURING A PROGRESSIVE SUNGLASSES LENS AND METHOD FOR DESIGNING A PROGRESSIVE SUNGLASSES LENS|

US10884264B2|2018-01-30|2021-01-05|Sightglass Vision, Inc.|Ophthalmic lenses with light scattering for treating myopia|

US10921612B2|2018-03-29|2021-02-16|Reopia Optics, Llc.|Spectacles and associated methods for presbyopia treatment and myopia progression control|

US11156854B2|2019-08-02|2021-10-26|Horizons Optical, S.L.U.|Progressive ophthalmic lens|

法律状态:
2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2019-07-16| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|

2020-04-14| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

2020-08-18| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2020-11-17| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 17/11/2020, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

AU2009905468|2009-11-09|

AU2009905468A|AU2009905468A0|2009-11-09|Ophthalmic lens element|

PCT/AU2010/001486|WO2011054058A1|2009-11-09|2010-11-09|Ophthalmic lens element|

[返回顶部]