TW202242493A - Full-focus depth-of-field contact lenses having the advantage of reducing the tight contraction of the ciliary muscle for a long time to effectively relieve the eye pressure and correct the symptoms of the presbyopia - Google Patents

Abstract

Disclosed is a pair of continuous zooming contact lenses, including an optical zone with a diameter of 0.5mm to 6mm formed with an imaginary central optical axis as a center of a circle, wherein a diopter of the optical zone changes continuously from the central optical axis to an outer circular area, a first diopter of the optical zone forms a corresponding first focal length, a second diopter of the optical zone forms a corresponding second focal length, a difference between the first focal length and the second focal length is a depth-of-field range, and the quality of an image formed within the depth-of-field range is better than the quality of an image formed outside the depth-of-field range. This invention has the advantage of reducing the tight contraction of the ciliary muscle for a long time to effectively relieve the eye pressure and correct the symptoms of the presbyopia.

Description

Continuous Zoom Contact Lenses

The invention relates to a contact lens, in particular to a contact lens with a continuous zoom function.

When the human eye is looking at an object, the eye will automatically adjust the shape and thickness of the lens through the ciliary muscle to achieve the purpose of focusing. When the eyes look far away, the ciliary muscle is in a relaxed state, allowing the lens to become thinner to adjust the focal length. On the contrary, When the eyes look close, the ciliary muscle is in a state of contraction and tension, allowing the lens to expand to adjust the focal length. As you grow older, you will find that you need to read at a close distance of more than about 30 cm or even farther to see clearly, or the eyes When the far and near alternate, it takes a few seconds to see the target clearly, and the reason for the above symptoms is that the lens in the eye and the related supporting adjustment tissues gradually lose their elasticity, and the adjustment function declines, so that although the ciliary muscle contracts, But the crystal will not be deformed, which will make the nearby target objects unclear.

For the multifocal soft contact lens described in the Republic of China Patent No. M582144, please refer to Figure X. The multifocal soft contact lens includes a central area, a transition area, an annular area, a connecting area, and an outer periphery. Unfortunately, What is more interesting is that there is a certain difference between the central area and the annular area. When the wearer switches between seeing far and near, the rapid change of diopter will cause visual jumping, which makes the wearer Have dizziness or other discomfort.

In view of this, how to solve the above-mentioned problems is the primary subject to be solved by the present invention.

The main purpose of the present invention is to provide a continuous zoom contact lens, which has the effect of relieving eye pressure and correcting symptoms of presbyopia.

In order to achieve the aforementioned purpose, the present invention provides a continuous zoom contact lens, which includes an optical zone, which is a circular area with a diameter of 0.5 mm to 6 mm formed with an assumed central optical axis as the center of the circle, and the diopter of the optical zone is determined by the central light. The axial outer circular area changes continuously, a first diopter of the optical zone forms a corresponding first focal length, and a second diopter of the optical zone forms a corresponding second focal length.

A depth of field range is the range of the difference between the first focal length and the second focal length, and the quality of an image formed within the depth of field range is better than that formed outside the depth of field range.

Preferably, the ADD of the depth-of-field range is between 0.5 and 4.0D.

Preferably, the focal length within the depth-of-field range continuously increases gradually from the first focal length to the second focal length.

Preferably, the focal length within the depth-of-field range continuously decreases from the first focal length to the second focal length.

Preferably, the focal length within the depth of field ranges from the first focal length to the second focal length in a trend of increasing first and then decreasing.

Preferably, the optical zone has a first optical zone, and a second optical zone extending outwardly from the first optical zone, the depth-of-field range has a first extent corresponding to the first optical zone, and In a second range corresponding to the second optical zone, the focal length in the first range presents an increasing trend, and the focal length in the second range presents a decreasing trend.

Preferably, the focal length within the depth-of-field range from the first focal length to the second focal length first decreases and then gradually increases.

Preferably, the optical zone has a first optical zone, and a second optical zone extending outwardly from the first optical zone, the depth-of-field range has a first extent corresponding to the first optical zone, and In a second range corresponding to the second optical zone, the focal length in the first range shows a decreasing trend, and the focal length in the second range shows a gradual increasing trend.

Preferably, the first optical zone is a circular area with a diameter of 0.5 mm to 4 mm formed with an assumed central optical axis as the center of the circle, and the second optical zone is formed with a assumed central optical axis as the center of the circle with a diameter of 4 mm. to a circular area of 6mm.

The above objects and advantages of the present invention can be easily understood from the detailed description of the following selected embodiments and the accompanying drawings.

Please refer to Fig. 1 and Fig. 2. The one shown in the figure is the first embodiment selected by the present invention, which is for illustration only, and is not limited by the embodiment in the patent application.

The continuous zoom contact lens 1 provided by the first embodiment of the present invention includes an optical zone 10, a depth of field range 20 and a peripheral zone 30, wherein:

The optical zone 10 takes the center of the continuous zoom contact lens 1 as a hypothetical central optical axis L, and surrounds the hypothetical central optical axis L as the center to form a circular area with a diameter of 0.5 mm to 6 mm. The reason for this design The reason is that under normal use of the eyes of ordinary people, the visual area is mostly located in a circular area with a diameter of 6 mm, and the curvature radius of the inner surface of the optical area 10 (base curve, Base Curve) is between 8.0 mm and 9.0 mm. , if the base curve of the lens is too large, there may be a problem that the lens cannot stick to the eyeball and is easy to shift. If the base curve of the lens is too small, it is easy to cause tight discomfort in the eyes. Generally, the base curve of the lens is about the base curve of the eyeball. The difference is about 1.1 times. In addition, in this embodiment, the continuous zoom contact lens 1 is an optical system composed of an aspheric front arc and a single curvature in the back arc. In other embodiments, the continuous zoom contact lens 1. It can be an optical system composed of a single curvature in the front arc and an aspheric surface in the back arc, or an optical system composed of aspheric surfaces in both the front arc and the back arc. All of the above optical systems belong to the protection scope of the present invention .

Ｚ = 平行於光軸的表面的表面輪廓 ｓ = 與光軸之間的徑向距離 Ｃ = 曲率、半徑的倒數 ｋ = 圓錐常數 Ａ4、Ａ6、Ａ8… = 第4次、第6次、第8次…非球面係數 當ｋ= 0時，圓錐表面為球面；當ｋ＞ -1時，圓錐表面為橢圓；當ｋ= -1時，圓錐表面為拋物面；當ｋ＜ -1時，圓錐表面為雙曲面。 The equation of the aspheric optical system of the present invention is as follows:

Z = surface profile of the surface parallel to the optical axis s = radial distance from the optical axis C = curvature, reciprocal of radius k = conic constants A4, A6, A8... = 4th, 6th, 8th Secondary...Aspheric coefficient When k=0, the conical surface is spherical; when k>-1, the conical surface is elliptical; when k=-1, the conical surface is parabolic; when k<-1, the conical surface is Hyperboloid.

The continuous zoom contact lens 1 of the aspheric optical system provided by the present invention can be obtained through the existing manufacturing method, and the existing manufacturing method can be roughly divided into three types: including turning method (Lathe Cutting), mold casting method (Cast Molding), and Spin Casting and other methods.

The continuous zoom contact lens 1 of the present invention can be made of the following materials: hydroxyethyl methacrylate (HEMA), methyl methacrylate (MMA), methyl methacrylate (MMA) and glycerin acrylate copolymer, hydrophilic Hydrogel, hydrophobic silicone hydrogel, the above materials are just examples and do not limit the materials that can be used in the present invention.

The continuous zoom contact lens 1 of the present invention is suitable for various soft contact lenses, for example: silicone hydrogel soft contact lenses, multi-focus soft contact lenses, water ladder soft contact lenses, astigmatism soft contact lenses, hydrogel soft contact lenses, filter Blu-ray soft contact lenses, colored soft contact lenses. The continuous zoom contact lens 1 of the present invention is suitable for various hard contact lenses, such as night-wear hard contact lenses, astigmatic hard contact lenses, aspheric hard contact lenses, and special hard contact lenses for keratoconus.

The optical zone 10 includes a first optical zone 11 and a second optical zone 12, wherein the first optical zone 11 is a circular area surrounded by the hypothetical central optical axis L as the center of a circle. In this embodiment, The diameter of the first optical zone 11 is 0.5 mm to 4 mm. In actual structural design, the diameter of the first optical zone 11 is not limited to the range of 0.5 mm to 4 mm, and can be adjusted according to imaging quality or manufacturing technology. The diopter of the first optical zone 11 changes continuously radially outward from the hypothetical central optical axis L. The diopter of the first optical zone 11 can also show a continuous decreasing trend radially outward from the assumed central optical axis L. The setting of the aforementioned trend can be adjusted according to the actual needs of the wearer. The setting also includes the initial diopter of the first optical zone 11, if the wearer is a hyperopic patient, the diopter suitable for hyperopic patients should be used as the initial value.

The second optical zone 12 is a circular area extending outward from the first optical zone 11. In this embodiment, the second optical zone 12 is surrounded by the hypothetical central optical axis L as the center and has a diameter of 4 mm. In the actual structural design, the diameter of the first optical zone 11 is not limited to the range of 4mm to 6mm, and can be adjusted according to the imaging quality or manufacturing technology. The diopter of the second optical zone 12 changes continuously radially outward from the hypothetical central optical axis L. Continuously increasing trend, the diopter of the second optical zone 12 may also show a continuous decreasing trend radially outward from the hypothetical central optical axis L, and the setting of the aforementioned trend can be adjusted according to the actual needs of the wearer.

The peripheral area 30 is a circular area with a diameter other than 6 mm surrounded by the hypothetical central optical axis L as the center of a circle. The peripheral area 30 is a non-primary visual area and does not have the effect of correcting vision. The structural design of the peripheral area 30 The main purpose is to improve the comfort of the wearer when using the continuous zoom contact lens 1. By increasing the wearing area between the continuous zoom contact lens 1 and the eye, the continuous zoom contact lens 1 can be stably attached to the cornea, avoiding The continuous zoom contact lens 1 makes the wearer feel uncomfortable due to sliding to the inside of the eyelid.

Please refer to Figure 2 again, the optical zone 10 has a first diopter 13 adjacent to the hypothetical central optical axis L, the first diopter 13 forms a corresponding first focal length 14, and the optical zone 10 is far away from the hypothetical center The position of the optical axis L has a second diopter 15, the second diopter 15 forms a corresponding second focal length 16, the first diopter 13 is smaller than the second diopter 15, so that the corresponding first focal length 14 is greater than the first Two focal lengths 16, the range of difference between the first focal length 14 and the second focal length 16 forms the depth of field range 20, and the quality of an image formed within the depth of field range 20 is better than the quality of an image formed outside the depth of field range 20, in other words, The depth of field range 20 has the effect of correcting vision, and the ADD of the depth of field range 20 is between 0.5 and 4.0D. It is worth noting that since the first diopter 13 and the second diopter 15 are continuous Therefore, the change of the focal length within the depth of field range 20 formed by the corresponding first focal length 14 and the second focal length 16 also shows a continuous changing trend.

The depth of field range 20 can be further divided into a first range 21 and a second range 22, the first range 21 has a corresponding relationship with the first optical zone 11 of the optical zone 10, the second range 22 and the The second optical zone 12 of the optical zone 10 has a corresponding relationship. Therefore, when the diameter ranges of the first and second optical zones 11 and 12 are adjusted due to design requirements, the first and second ranges 21 of the depth of field range 20 , The interval of 22 will also produce corresponding changes.

When the wearer is looking at targets at different distances, the wearer's brain can judge the distance and choose the most appropriate focal length from the depth of field range 20, so that the target can be accurately imaged on the wearer's To produce a clear visual image on the retina, more specifically, when the wearer is gazing at a nearby object, the wearer's brain can select the most suitable focal length for seeing the near object from the depth of field range 20, so that The wearer's ciliary muscle does not need excessive force, reducing the situation of long-term tightness and contraction of the ciliary muscle, thereby achieving the purpose of effectively relieving eye pressure; and when the wearer is staring at a distant target, the wearer The wearer's brain can choose the most suitable focal length for seeing distant objects from the depth of field range 20, so that the wearer can clearly see distant objects. In addition, since the focal length within the depth of field range 20 changes continuously, the matching When the wearer switches from near-sighted to far-sighted, there will be no visual jumping caused by a sharp change in focal length, which can avoid the wearer from feeling dizzy and uncomfortable.

And the continuous zoom contact lens 1 provided by the present invention is also suitable for wearers with reduced lens adjustment function. The depth of field range of 20 selects the focal length for viewing close objects, so even if the curvature of the lens does not change significantly for focusing, the target object can be accurately imaged on the wearer's retina, thereby producing a clear visual image.

Please refer to Fig. 3, the continuous zoom contact lens 1 provided by the first embodiment of the present invention, the position near the hypothetical central optical axis L in the optical zone 10 has the first diopter 13, and the position in the optical zone 10 far away from the hypothetical The position of the central optical axis L has the second diopter 15, the corresponding first focal length 14 formed by the first diopter 13 is about 0.33m, and the corresponding second focal length 16 formed by the second diopter 15 is about 1m, The ADD of the depth of field range 20 is 2.0, and the focal length within the depth of field range 20 is continuously increasing from the first focal length 14 to the second focal length 16 . When the wearer is looking at objects at different distances, the wearer's brain can choose the most appropriate focal length from the depth of field range of 20 (0.33m to 1m), so that the object can be accurately imaged on the retina to produce a clear image. The visual image, and because the focal length within 20 within the depth of field range from 0.33m to 1m shows a continuous and gradual increase trend, the wearer will not feel dizzy and uncomfortable due to the rapid change of the focal length when watching the transition of near and far objects.

Please refer to Fig. 4, the continuous zoom contact lens 1 provided by the second embodiment of the present invention, the position near the hypothetical central optical axis L in the optical zone 10 has the first diopter 13, and the position in the optical zone 10 far away from the hypothetical The position of the central optical axis L has the second diopter 15, the corresponding first focal length 14 formed by the first diopter 13 is about 1m, and the corresponding second focal length 16 formed by the second diopter 15 is about 0.33m, The ADD of the depth of field range 20 is 2.0, and the focal length within the depth of field range 20 is continuously decreasing from the first focal length 14 to the second focal length 16 . When the wearer is viewing objects at different distances, the wearer's brain can select the most appropriate focal length from the depth of field range (1m to 0.33m), so that the object can be accurately imaged on the retina to produce a clear image. Visual images, and because the focal length within 20 of the depth of field range from 1m to 0.33m shows a continuous decreasing trend, the wearer will not feel dizzy and uncomfortable when watching the transition of near and far objects due to the sharp change of focal length.

Please refer to Fig. 5, the continuous zoom contact lens 1 provided by the third embodiment of the present invention, the position near the hypothetical central optical axis L in the optical zone 10 has the first diopter 13, and the position in the optical zone 10 far away from the hypothetical The position of the central optical axis L has the second diopter 15, the corresponding first focal length 14 formed by the first diopter 13 is about -0.33m, and the corresponding second focal length 16 formed by the second diopter 15 is about - 0.33m, the ADD of the depth of field range 20 is 2.0, and the focal length within the depth of field range 20 from the first focal length 14 to the second focal length 16 shows a trend of increasing first and then decreasing. Furthermore, the first optical zone The focal length in the first range 21 corresponding to 11 (a circular area with a diameter of 0.5mm to 4mm) is gradually increasing, and the second optical zone 12 (a circular area with a diameter of 4mm to 6mm) corresponds to a second The focal length in range 22 shows a decreasing trend.

When the wearer is staring at a short-distance target, the target can be accurately corrected through the correction of the inner optical zone and the outer optical zone (about 1mm to 3mm in diameter, and a circular area with a diameter of 5mm to 6mm). It is imaged on the retina to produce a clear visual image, and when looking at a target at a medium distance, the target can be seen clearly through the middle area of the optical zone 10 (a circular area with a diameter of about 3mm to 5mm). The wearer's brain can choose the most suitable focal length for seeing close objects from the depth of field range 20, so that the wearer's ciliary muscle does not need excessive force, reducing the situation of long-term tightness and contraction of the ciliary muscle, thereby achieving The purpose of effectively relieving eye pressure, and because the focal length system within the depth of field range 20 is a continuous change trend, the wearer will not feel dizzy discomfort due to the rapid change of the focal length when watching the conversion of near and far objects.

Please refer to Fig. 6, the continuous zoom contact lens 1 provided by the fourth embodiment of the present invention, the position near the hypothetical central optical axis L in the optical zone 10 has the first diopter 13, and the position in the optical zone 10 far away from the hypothetical The position of the central optical axis L has the second diopter 15, the corresponding first focal length 14 formed by the first diopter 13 is about -1.0m, and the corresponding second focal length 16 formed by the second diopter 15 is about - 1.0m, the ADD of the depth of field range 20 is 2.0, and the focal length within the depth of field range 20 from the first focal length 14 to the second focal length 16 shows a trend of decreasing first and then gradually increasing. Furthermore, the first optical zone 11 (a circular area with a diameter of 0.5 mm to 4 mm) corresponds to a decreasing trend of the focal length in the first range 21, and the second range corresponding to the second optical zone 12 (a circular area with a diameter of 4 mm to 6 mm) The focal length within 22 is increasing gradually.

When the wearer is looking at a near-distance target, the correction of the middle area of the optical zone 10 (a circular area with a diameter of about 3mm to 5mm) can be corrected, so that the target can be accurately imaged on the retina to produce a clear image. Visual image, and when you look at the target in the distance, you can see the target clearly through the inner optical zone and the outer optical zone (circular areas with a diameter of about 1mm to 3mm and a diameter of 5mm to 6mm). The wearer's brain can choose the most suitable focal length for seeing close objects from the depth of field range 20, so that the wearer's ciliary muscle does not need to exert excessive force, reducing the situation of long-term tightness and contraction of the ciliary muscle, so as to achieve effective The purpose of relieving eye pressure, and because the focal length system within the depth of field range 20 is a continuous change trend, the wearer will not feel dizzy discomfort due to the rapid change of the focal length when watching the conversion of near and far objects.

However, the disclosure of the above embodiments is only used to illustrate the present invention, not to limit the present invention, so any changes in numerical values or replacement of equivalent elements should still fall within the scope of the present invention.

To sum up, when it can make those who are familiar with this technology understand that the present invention can clearly achieve the above-mentioned purpose, it actually complies with the provisions of the Patent Law, so the application is filed according to the law.

1:Continuous zoom contact lens 10: Optical zone 11: The first optical zone 12: Second optical zone 13: first diopter 14: First focal length 15: second diopter 16: second focal length 20: Depth of field range 21: First range 22: second range 30: Surrounding area L: Assumed central optical axis

Figure 1 is a schematic plan view of the continuous zoom contact lens of the present invention; Figure 2 is a schematic plan view of the optical zone and depth of field range of the present invention; Fig. 3 is a focal length distribution diagram of the first embodiment of the present invention; Figure 4 is a focal length distribution diagram of the second embodiment of the present invention; Fig. 5 is a focal length distribution diagram of the third embodiment of the present invention; Fig. 6 is a focal length distribution diagram of the fourth embodiment of the present invention.

1:Continuous zoom contact lens

11: The first optical zone

12: Second optical zone

13: first diopter

14: First focal length

15: second diopter

16: second focal length

20: Depth of field range

30: Surrounding area

L: assumed central optical axis

Claims (9)

A continuous zoom contact lens comprising: An optical zone is a circular area with a diameter of 0.5 mm to 6 mm formed by assuming the central optical axis as the center of the circle. The diopter of the optical zone changes continuously from the circular area outside the central optical axis. A first part of the optical zone A diopter forms a corresponding first focal length, and a second diopter of the optical zone forms a corresponding second focal length; A depth of field range is the range of the difference between the first focal length and the second focal length, and the quality of an image formed within the depth of field range is better than that formed outside the depth of field range. The continuous zoom contact lens according to claim 1, wherein the ADD of the depth of field range is between 0.5 and 4.0D. The continuous zoom contact lens as described in Claim 1, wherein the focal length within the depth of field range is continuously increasing from the first focal length to the second focal length. The continuous zoom contact lens as described in claim 1, wherein the focal length within the depth of field range is continuously decreasing from the first focal length to the second focal length. The continuous zoom contact lens according to Claim 1, wherein the focal length within the depth of field range from the first focal length to the second focal length shows a trend of increasing first and then decreasing. The continuous zoom contact lens according to claim 5, wherein the optical zone has a first optical zone and a second optical zone extending outward from the first optical zone, and the depth of field range has the same range as the first optical zone There is a first range corresponding to the optical zone, and a second range corresponding to the second optical zone, the focal length in the first range shows a gradual increasing trend, and the focal length in the second range shows a decreasing trend. The continuous zoom contact lens as described in claim 1, wherein the focal length within the depth of field range from the first focal length to the second focal length first decreases and then gradually increases. The continuous zoom contact lens according to claim 7, wherein the optical zone has a first optical zone and a second optical zone extending outward from the first optical zone, and the depth of field range has the same range as the first optical zone A first range corresponding to the second optical zone, and a second range corresponding to the second optical zone, the focal length in the first range shows a decreasing trend, and the focal length in the second range shows a gradual increasing trend. The continuous zoom contact lens according to claim 6 or 8, wherein the first optical zone is a circular area with a diameter of 0.5 mm to 4 mm formed by taking an assumed central optical axis as the center, and the second optical zone is defined by A circular area with a diameter of 4mm to 6mm formed by assuming the central optical axis as the center of the circle.

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