CN211293490U - contact lens - Google Patents

Abstract

The utility model describes a corneal contact lens, it includes: an outer surface which is convex and is composed of an optical surface positioned at the center and a peripheral surface formed by surrounding the optical surface, wherein the curvature of the optical surface is smaller than that of the peripheral surface; and the inner surface is concave, the inner surface consists of a basal arc surface which is contacted with the cornea and provides optical correction action and a side arc surface which is formed by surrounding the basal arc surface, the side arc surface is respectively connected with the peripheral surface and the basal arc surface, the curvature of the basal arc surface is less than that of the peripheral surface, the curvature of the basal arc surface is greater than that of the front surface of the cornea, the inner surface has quadrant specificity, and the inner surface is matched with the shapes of different quadrants of the cornea through quadrant partition design. According to the utility model discloses can provide one kind and well-matched cornea contact lens of cornea.

Description

contact lens

technical field

The utility model particularly relates to a corneal contact lens.

Background technique

Rigid oxygen-permeable contact lens (RGP) is a safe and effective contact lens for refractive correction, especially for patients with large astigmatism. Small enough to be worn for a long time. In recent years, due to the synthesis and application of polymer materials with high Dk value, high elastic modulus, hydrophilicity, anti-precipitation and good biocompatibility, rigid contact lenses have been rapidly popularized worldwide.

The average human cornea is non-absolutely spherical, with different corneal shapes in different quadrants and different axial directions, while most RGPs are only spherically designed or designed for the steepest and flattest parts, which cannot be well matched with the cornea. At the same time, the RGP with multi-focus design can delay the control of myopia.

Utility model content

In view of the above-mentioned existing situation, the present utility model aims to provide a corneal contact lens that is well matched with the cornea.

Therefore, the present invention provides a corneal contact lens, which comprises: an outer surface, which is convex, the outer surface is composed of an optical surface located in the center and a peripheral surface formed around the optical surface, the The curvature of the optical surface is less than the curvature of the peripheral surface; and the inner surface, which is concave, the inner surface is formed by a base arc surface that contacts the cornea and provides an optical correction effect and a side arc surface formed around the base arc surface composition, the side arc surface is respectively connected with the peripheral surface and the base arc surface, the curvature of the base arc surface is smaller than the curvature of the peripheral surface, and the curvature of the base arc surface is greater than that of the anterior surface of the cornea. curvature, and the inner surface is quadrant-specific, and the inner surface is quadrant-zoned to match the morphology of the different quadrants of the cornea.

In the present invention, the corneal contact lens has an outer surface and an inner surface, wherein the inner surface has quadrant specificity, and the inner surface is designed to match the shape of different quadrants of the cornea through quadrant partition design, so that the inner surface can better match each quadrant. The shape of the cornea is matched, that is, it can better contact and fit with the cornea of each quadrant, so it can help to evenly disperse the pressure caused by the contact lens on the cornea, thereby improving the safety and comfort of the contact lens. In addition, the curvature of the optical surface is smaller than that of the peripheral surface and the curvature of the base arc surface is smaller than that of the peripheral surface, which can help to form the outer surface of the first predetermined shape and the inner surface of the second predetermined shape. In addition, the curvature of the basal arc surface is greater than that of the anterior surface of the cornea, which can facilitate the formation of a tear fluid space between the inner surface and the cornea.

In addition, in the contact lens of the present invention, optionally, the base arc surface is divided into four quadrants for quadrant partition design, and the side arc surface is divided into four quadrants for quadrant partition design. In this way, it can better match the corneal shape of the four quadrants, that is, it can better contact and fit the cornea of the four quadrants, which can help to evenly disperse the pressure caused by the contact lens on the cornea, thereby It can improve the safety and comfort of contact lenses.

In addition, in the contact lens of the present invention, optionally, the contact lens is fitted based on the corneal curvature of the cornea and the corneal astigmatism value. In this way, the contact lens can be facilitated to cooperate with the cornea, and the comfort of wearing and the clarity of vision correction can be improved.

In addition, in the contact lens of the present invention, optionally, the diameter of the base arc surface is larger than the diameter of the optical surface. Thereby, the defocusing design of the front surface of the contact lens can be facilitated.

In addition, in the corneal contact lens of the present invention, optionally, the corneal contact lens is composed of a rigid high oxygen permeability material, and the rigid high oxygen permeability material is selected from the group consisting of siloxane methacrylate, fluorine One of silicon methacrylate, perfluoroether and fluorinated siloxane. In this case, the contact lens can not only have good oxygen permeability, but also can improve the anti-wear ability of the contact lens and is beneficial to the production of the contact lens.

In addition, in the contact lens of the present invention, optionally, when the contact lens is worn on the eyeball, a tear space is formed between the inner surface and the cornea. Thereby, the abrasion of the cornea by the contact lens can be reduced, and the wearing comfort can be improved.

In addition, in the contact lens according to the present invention, optionally, in the contact lens, the thickness between the peripheral surface and the base arc surface gradually increases as it approaches the base arc surface increase. Thereby, the limbic region can help support the contact lens to be worn on the cornea.

In addition, in the contact lens of the present invention, optionally, a multifocal contact lens is formed by defocusing the front surface. In this case, the multifocal design is on the front surface of the contact lens, which enables the contact lens to have different powers in different areas.

In addition, in the contact lens of the present invention, optionally, the contact lens has a distance vision zone and a defocus vision zone. In this way, the contact lens can have the effect of myopia and defocus, so that the progression of myopia can be controlled or slowed down, and at the same time, the demand for vision correction can be met.

In addition, in the corneal contact lens of the present invention, optionally, the corneal contact lens has a progressive diopter. Thereby, the contact lens can effectively improve the vision condition and reduce the speed of myopia progression.

According to the utility model, a corneal contact lens well matched with the cornea can be provided.

Description of drawings

FIG. 1 is a schematic diagram showing the structure of a contact lens according to an example of the present invention.

FIG. 2 is a diagram illustrating an application scenario of the contact lens according to an example of the present invention.

3 is a cross-sectional view showing an outer surface of a contact lens according to an example of the present invention.

4 is a cross-sectional view showing an inner surface of a contact lens according to an example of the present invention.

5 is a bottom view showing a contact lens according to an example of the present invention.

6 is a plan view showing a contact lens according to an example of the present invention.

FIG. 7 is an area distribution diagram showing a contact lens according to an example of the present invention.

Detailed ways

All references cited herein are incorporated by reference in their entirety as if fully set forth. Unless otherwise defined, technical and scientific terms used in the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals are assigned to the same components, and overlapping descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratios of the dimensions of the members, the shapes of the members, and the like may be different from the actual ones.

FIG. 1 is a schematic diagram showing the structure of a contact lens 1 according to an example of the present invention.

As shown in FIG. 1 , the contact lens 1 according to this embodiment may include: an outer surface 10 , which is convex, and the outer surface 10 is composed of an optical surface 11 located in the center and a peripheral surface 12 surrounding the optical surface 11 . , the curvature of the optical surface 11 is less than the curvature of the peripheral surface 12; and the inner surface 20, which is concave, and the inner surface 20 is formed by the base arc surface 21 that is in contact with the cornea 2 and provides an optical correction effect and the edge formed around the base arc surface 21 The arc surface 22 is formed, the edge arc surface 22 is respectively connected with the peripheral surface 12 and the base arc surface 21, the curvature of the base arc surface 21 is smaller than the curvature of the peripheral surface 12, the curvature of the base arc surface 21 is greater than the curvature of the front surface of the cornea 2, and the inner The surface 20 is quadrant-specific, and the inner surface 20 is quadrant-zoned to match the morphology of the different quadrants of the cornea 2 .

In this embodiment, the contact lens 1 has an outer surface 10 and an inner surface 20, wherein the inner surface 20 is quadrant-specific, and the inner surface 20 is designed to match the morphology of different quadrants of the cornea 2 through the quadrant partition design. Therefore, the inner surface 20 It can better match the shape of the cornea 2 in each quadrant, that is, it can better contact and fit with the cornea 2 in each quadrant, so it can help to evenly disperse the pressure caused by the contact lens 1 on the cornea 2, so as to be able to The safety and comfort of the contact lens 1 are improved. In addition, the curvature of the optical surface 11 is smaller than that of the peripheral surface 12 and the curvature of the base arc surface 21 is smaller than that of the peripheral surface 12, which can help to form the outer surface 10 of the first predetermined shape and the inner surface 20 of the second predetermined shape. In addition, the curvature of the base arc surface 21 is greater than the curvature of the front surface of the cornea 2 , which can facilitate the formation of a tear fluid space between the inner surface 20 and the cornea 2 .

FIG. 2 is a diagram illustrating an application scenario of the contact lens 1 according to an example of the present invention.

In some examples, as shown in FIG. 2 , when the contact lens 1 is worn on the eyeball, a tear space may be formed between the inner surface 20 and the cornea 2 . Thereby, the abrasion of the cornea 2 by the contact lens 1 can be reduced, and the wearing comfort can be improved.

In some examples, the tear space can be filled with tears. In other examples, the tear space can be filled with a healing potion. Additionally, in some examples, the tear layer within the tear space may be formed as a tear mirror. Thereby, astigmatism correction can be contributed.

In some examples, the contact lens 1 may be fitted based on the corneal 2 curvature of the cornea 2 and the corneal 2 astigmatism value. In this way, the contact lens 1 and the cornea 2 can be facilitated to cooperate with each other, and the comfort of wearing and the clarity of vision correction can be improved. For example, the curvature of the basal surface 21 of the inner surface 20 may be greater than the curvature of the cornea 2 .

In some examples, the contact lens 1 may be constructed of a rigid material. In other examples, the contact lens 1 may be constructed of a rigid, highly oxygen-permeable material. In this case, not only can the contact lens 1 have good oxygen permeability, but also the abrasion resistance of the contact lens 1 can be improved and the production of the contact lens 1 can be facilitated.

In some examples, the oxygen permeability coefficient (DK value) of the rigid high oxygen permeability material may be 100 to 200. For example, a rigid high oxygen permeability material may have a DK value of 100, 125 or 141.

In some examples, the rigid high oxygen permeability material may be one selected from the group consisting of siloxane methacrylate, fluorosilicon methacrylate, perfluoroether, and fluorinated siloxane.

In some examples, the diameter of the contact lens 1 may be 8.5 mm to 12.0 mm. For example, the diameter D1 of the contact lens ₁ may be 8.5mm, 8.8mm, 9mm, 9.2mm, 9.6mm, 10.0mm, 10.2mm, 10.5mm, 10.8mm, 11mm, 11.2mm, 11.5mm, 11.8mm or 12mm .

Furthermore, in some examples, the thickness of the contact lens 1 may be 0.10 mm to 1.00 mm. In this way, the deformation of the lens of the contact lens 1 can be alleviated, and the excessive weight of the contact lens 1 can also be avoided. For example, the thickness of the contact lens 1 may be 0.10mm, 0.12mm, 0.15mm, 0.18mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9 mm or 1mm.

In some examples, the DK value of contact lens 1 may be 100-200. Thereby, it can have better oxygen permeability, so that the tear fluid can provide oxygen to the cornea 2 , thereby helping to maintain the health of the cornea 2 . For example, the DK value of contact lens 1 may be 100, 125 or 141.

In some examples, the contact lens 1 may be a soft-rigid hybrid contact lens. Additionally, in some examples, the central region of the contact lens 1 may be composed of a hard material, and the peripheral region may be composed of a soft material.

FIG. 3 is a cross-sectional view showing the outer surface 10 of the contact lens 1 according to the example of the present invention. FIG. 5 is a bottom view showing the contact lens 1 according to an example of the present invention.

In some examples, as shown in FIG. 1 , the outer surface 10 of the contact lens 1 may be convex. Additionally, in some examples, as shown in FIG. 3 , the outer surface 10 may include an optical face 11 and a peripheral face 12 . Wherein, as shown in FIG. 5 , the peripheral surface 12 may be formed around the optical surface 11 , that is, the optical surface 11 may be located in the center of the outer surface 10 . In other examples, the optical surface 11 may be used to provide optical correction.

In some examples, the curvature of the optical face 11 may be less than the curvature of the peripheral face 12 . Thereby, the formation of the outer surface having the first predetermined shape can be facilitated. For example, the outer surface 10 may form a first predetermined shape as shown in FIG. 3 .

In some examples, the diameter D ₁ of the optical face 11 may be 7 mm to 10 mm. For example, the diameter D1 of the optical surface ₁₁ may be 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm or 10 mm.

In the present invention, as shown in FIG. 5 , the diameter D ₁ of the optical surface 11 may refer to the maximum linear distance between two points corresponding to the edge of the optical surface 11 .

FIG. 4 is a cross-sectional view showing the inner surface 20 of the contact lens 1 according to the example of the present invention. FIG. 6 is a plan view showing the contact lens 1 according to an example of the present invention.

In some examples, as shown in FIG. 1 , the inner surface 20 of the contact lens 1 may be convex. Additionally, in some examples, as shown in FIG. 4 , the inner surface 20 may include a base camber surface 21 and an edge camber surface 22 . Wherein, as shown in FIG. 6 , the side arc surface 22 may be formed around the base arc surface 21 , that is, the base arc surface 21 may be located at the center of the inner surface 20 .

In some examples, as shown in FIG. 1 , the base arc surface 21 may correspond to the optical surface 11 . For example, the center of the base arc surface 21 may correspond to the center of the optical surface 11 (see FIG. 7 ). In other examples, the base camber surface 21 may be used to provide optical correction.

In some examples, the curvature of the base surface 21 may be less than the curvature of the peripheral surface 12 . Thereby, the formation of the inner surface 20 of the second predetermined shape can be facilitated. For example, the inner surface 20 may form a second predetermined shape as shown in FIG. 4 .

In some examples, the curvature of the optical surface 11 is less than the curvature of the peripheral surface 12 , and the curvature of the base arc surface 21 is less than the curvature of the peripheral surface 12 . Thereby, it can help to form the outer surface 10 of the first predetermined shape and the inner surface 20 of the second predetermined shape, which can help to form a contact lens 1 having a specific shape, for example, can help to form a cornea with a supporting cornea. The edge region 1c of the contact lens 1. Additionally, in some examples, the contact lens 1 may be formed into a specific shape as shown in FIG. 1 .

In some examples, as shown in FIG. 1 , the side arcuate surfaces 22 may have no curvature. In other words, on a cross section of the contact lens 1 along the sagittal height passing through the center of the contact lens 1 , the arcuate surface 22 is formed in a linear shape.

In some examples, the curvature of the base arc surface 21 may be equal to the curvature of the optical surface 11 . Thereby, the contact lens 1 can have a progressive diopter. In other examples, the curvature of the base arc surface 21 may be slightly smaller than the curvature of the optical surface 11 . Thereby, the contact lens 1 can have a progressive diopter.

In some examples, as shown in FIG. 1 , the diameter D ₂ of the base arc surface 21 may be larger than the diameter D ₁ of the optical surface 11 . Thereby, the defocusing design of the front surface of the contact lens 1 can be facilitated. Additionally, in some examples, the diameter D ₂ of the base arc surface 21 may be 7.7 mm to 10.0 mm. For example, the diameter D ₂ of the base arc surface 21 may be 7.7 mm, 8 mm, 8.3 mm, 8.5 mm, 8.7 mm, 9 mm, 9.3 mm, 9.5 mm, 9.7 mm or 10 mm.

In the present invention, as shown in FIG. 6 , the diameter D ₂ of the base arc surface 21 may refer to the maximum linear distance between two points corresponding to the edge of the base arc surface 21 .

In some examples, as shown in FIG. 1 , the side camber surfaces 22 may be connected to the peripheral surface 12 and the base camber surface 21 , respectively. Thereby, the inner surface 20 and the outer surface 10 can be connected to form the contact lens 1 . That is, the outer diameter of the peripheral surface 12 may be equal to the outer diameter of the side arc surface 22 . In other words, the outer diameter of the peripheral surface 12 and the outer diameter of the arcuate surface 22 may be equal to the diameter of the contact lens 1 .

In some examples, the inner surface 20 may be quadrant-specific. Additionally, in some examples, the inner surface 20 may be designed based on the morphology of the eyeball, ie, the inner surface 20 may be designed based on the morphology of the cornea 2 . Thereby, the physiological structure of the cornea 2 can be better matched, so that the cornea 2 can be better matched. In other examples, the inner surface 20 may be designed by quadrant partitioning.

In some examples, the inner surface 20 may be designed to match the morphology of the different quadrants of the cornea 2 via quadrant partitioning. In this way, it can better match the shape of the cornea 2 in each quadrant, that is, it can better contact and fit with the cornea 2 in each quadrant, which can help to evenly disperse the pressure caused by the contact lens 1 on the cornea 2 , so that the safety and comfort of the contact lens 1 can be improved.

In some examples, the inner surface 20 may be divided into multiple quadrants for quadrant zoning design. In addition, in some examples, the inner surface 20 can be divided into 2 quadrants for quadrant partition design, that is, the base arc surface 21 can be divided into 2 quadrants for quadrant partition design, and the edge arc surface 22 can be divided into 2 quadrants Perform a quadrant partition design.

In some examples, the inner surface 20 may be divided into a first quadrant and a second quadrant for quadrant partition design. That is, the base arc surface 21 can be divided into the first quadrant and the second quadrant for quadrant partition design, and the edge arc surface 22 can be divided into the first quadrant and the second quadrant for quadrant partition design.

In some examples, the first quadrant of the inner surface 20 may mate with the distal nasal side of the cornea 2 and the second quadrant may mate with the proximal nasal side of the cornea 2 . That is, the inner surface 20 of the first quadrant can be designed based on the morphology of the distal nasal side of the cornea 2 , and the inner surface 20 of the second quadrant can be designed based on the morphology of the proximal nasal side of the cornea 2 . The far-nasal side may be the side of the cornea 2 close to the temple, and the near-nasal side may be the side of the cornea 2 that is close to the nose (away from the temple).

Specifically, the first quadrant of the base camber surface 21 and the first quadrant of the side camber surface 22 may be matched with the distal nasal side of the cornea 2 , and the second quadrant of the basal camber surface 21 and the second quadrant of the side camber surface 22 may Matches the proximal nasal side of cornea 2. In other words, the first quadrant of the basal camber surface 21 and the first quadrant of the side camber surface 22 can be designed based on the shape of the cornea 2 on the far nasal side, and the second quadrant of the basal camber surface 21 and the second quadrant of the side camber surface 22 It can be designed based on the morphology of the cornea 2 on the near-nasal side.

In some examples, the first quadrant of the inner surface 20 can mate with the upper lid side of the cornea 2 and the second quadrant can mate with the lower lid side of the cornea 2 . The far nasal side may be the side of the cornea 2 that is close to the upper eyelid, and the near nasal side may be the side of the cornea 2 that is close to the lower eyelid (far away from the upper eyelid).

In some examples, the inner surface 20 may be divided into 4 quadrants for quadrant partition design. That is, the base arc surface 21 can be divided into four quadrants for quadrant partition design, and the side arc surface 22 can be divided into four quadrants for quadrant partition design. In this way, it can better match the shape of the cornea 2 in the four quadrants, that is, it can better contact and fit the cornea 2 in the four quadrants, which can help to uniformly disperse the effects of the contact lens 1 on the cornea 2 Therefore, the safety and comfort of the contact lens 1 can be improved.

In some examples, the inner surface 20 may be divided into a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant for quadrant partition design. That is, the base arc surface 21 can be divided into the first quadrant, the second quadrant, the third quadrant and the fourth quadrant for quadrant partition design, and the edge arc surface 22 can be divided into the first quadrant, the second quadrant, the third quadrant and the fourth quadrant. The fourth quadrant performs quadrant partition design.

In some examples, the first quadrant of the inner surface 20 can mate with the superior side of the cornea 2, the second quadrant can mate with the nasal side of the cornea 2, the third quadrant can mate with the inferior side of the cornea 2, and the fourth quadrant can mate with the nasal side of the cornea 2 The temporal side of the cornea 2 is matched. Wherein, the upper side can be the side of the cornea 2 that is close to the superior rectus muscle, the lower side can be the side of the cornea 2 that is close to the inferior rectus muscle (away from the superior rectus muscle), and the nasal side can be the side of the cornea 2 that is close to the medial rectus muscle One side, the temporal side may be the side of the cornea 2 that is close to the lateral rectus muscle (away from the medial rectus muscle).

In some examples, the first quadrant of the basal camber 21 and the first quadrant of the side camber 22 may match the upper side of the cornea 2 , and the second quadrant of the basal camber 21 and the second quadrant of the side camber 22 may match the upper side of the cornea 2 . The nasal side of the cornea 2 is matched, the third quadrant of the basal camber surface 21 and the third quadrant of the side camber surface 22 can be matched with the lower side of the cornea 2, the fourth quadrant of the basal camber surface 21 and the fourth quadrant of the side camber surface 22 Can be matched to the temporal side of cornea 2.

Specifically, the first quadrant of the basal camber surface 21 and the first quadrant of the side camber surface 22 can be designed based on the shape of the upper cornea 2 , and the second quadrant of the basal camber surface 21 and the second quadrant of the side camber surface 22 It can be designed based on the shape of the cornea 2 on the nasal side. The third quadrant of the basal camber surface 21 and the third quadrant of the side camber surface 22 can be designed based on the shape of the cornea 2 on the lower side. The fourth quadrant of the basal camber surface 21 and The fourth quadrant of the arcuate surface 22 can be designed based on the morphology of the temporal cornea 2 .

In some examples, the first quadrant of the inner surface 20 may mate with the nasal supralateral side of the cornea 2, the second quadrant may mate with the nasal inferolateral side of the cornea 2, the third quadrant may mate with the inferotemporal side of the cornea 2, and the fourth The quadrant can be matched to the superior temporal side of the cornea 2. Among them, the upper side of the nose can be the side of the cornea 2 that is close to the superior rectus and the medial rectus muscle, the lower side of the nose can be the side of the cornea 2 that is close to the medial rectus and the inferior rectus muscle, and the upper temporal side can be the side of the cornea 2. The side close to the lateral rectus muscle and the superior rectus muscle, and the inferior temporal side can be the side close to the lateral rectus muscle and the inferior rectus muscle in the cornea 2.

In some examples, the first quadrant of the basal camber 21 and the first quadrant of the side camber 22 may match the supranasal side of the cornea 2, and the second quadrant of the basal camber 21 and the second quadrant of the side camber 22 may Matching with the nasal underside of the cornea 2, the third quadrant of the basal camber surface 21 and the third quadrant of the side camber surface 22 can be matched with the lower temporal side of the cornea 2, and the fourth quadrant of the basal camber surface 21 and the side camber surface 22. The fourth quadrant can be matched to the superior temporal side of the cornea 2 .

Specifically, the first quadrant of the basal camber surface 21 and the first quadrant of the side camber surface 22 can be designed based on the shape of the cornea 2 on the upper side of the nose, the second quadrant of the basal camber surface 21 and the second quadrant of the side camber surface 22 The quadrant can be designed based on the shape of the cornea 2 under the nose, the third quadrant of the basal camber 21 and the third quadrant of the side camber 22 can be designed based on the shape of the cornea 2 on the lower temporal side, and the third quadrant of the basal camber 21 can be designed based on the shape of the cornea 2 under the temporal side. The four quadrants and the fourth quadrant of the side arc surface 22 can be designed based on the morphology of the cornea 2 on the superior temporal side.

In some examples, the inner surface 20 may also be divided into 3, 5, 6 or 8 quadrants for quadrant partition design.

In some examples, the inner surface 20 may have rotational symmetry. In other words, the inner surface 20 may not be quadrant specific.

In some examples, when the contact lens 1 is worn on the eyeball, the base arc surface 21 may be in contact with the cornea 2 . Thereby, the contact lens 1 can be fixed to the eyeball. In other examples, the base arc surface 21 may have a contact portion that is in contact with the cornea 2 . In addition, the quadrant partition design of the base arc surface 21 can improve the matching between the contact portion and the cornea 2 , thereby improving the comfort of the contact lens 1 .

In some examples, there may be a gap between the basal camber surface 21 and the cornea 2 , that is, the basal camber surface 21 and the cornea 2 may form a tear space. Additionally, in some examples, the thickness of the gap between the basal camber surface 21 and the cornea 2 does not exceed 20 μm. Thereby, the loss to the cornea 2 can be reduced, and the visual disturbance can also be reduced. For example, the thickness of the gap between the basal arcuate surface 21 and the cornea 2 may be 5 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm or 20 μm.

In some examples, the rim surface 22 may not be in contact with the cornea 2 . In some examples, when the contact lens 1 is worn on the eyeball, the arcuate surface 22 may form a warped angle with the cornea 2 for tear exchange. In addition, the quadrant partition design of the edge arc surface 22 can facilitate the formation of a more uniform warping angle for tear fluid exchange.

In some examples, the contact lens 1 may be formed as a multifocal contact lens with an anterior surface defocus design. In this case, the multi-focus is designed on the outer surface 10 of the contact lens 1, so that the contact lens 1 can have different refractive powers in different regions.

Additionally, in some examples, the contact lens 1 may have a progressive diopter. Thereby, the contact lens 1 can effectively improve the vision condition and reduce the speed of myopia progression.

In some examples, the contact lens 1 may include a central viewing zone and an outer viewing zone. Additionally, in some examples, the outer viewport may be formed around the center viewport. In other examples, the outer viewport may produce peripheral defocus.

In some examples, the central viewing zone and the outer viewing zone may be formed by matching the optical surface 11 with the base arc surface 21 . In other examples, the diameter of the central viewport may be selected based on the size of the pupil.

In other examples, the central viewing zone may be the distance viewing zone 1a, and the outer viewing zone may be the defocusing viewing zone 1b. Thereby, the contact lens 1 can be used to correct myopia.

FIG. 7 is a region distribution diagram showing the contact lens 1 according to an example of the present invention.

In some examples, as shown in FIG. 7, the contact lens 1 may have a distance viewing zone 1a and a defocus viewing zone 1b. In this way, the contact lens can have the effect of myopia and defocus, so that the progression of myopia can be controlled or slowed down, and at the same time, the demand for vision correction can be met. Wherein, the defocus viewing area 1b may be formed around the distant viewing area 1a. In addition, the out-of-focus viewing zone 1b may include a mid-range viewing zone and a near-distance viewing zone.

In some examples, as shown in FIG. 7 , the distance viewing zone 1 a and the defocusing viewing zone 1 b may be formed by matching the optical surface 11 with the base arc surface 21 . For example, the central area of the optical surface 11 may match the central area of the base arc surface 21 to form the distance viewing area 1a. In addition, in some examples, the out-of-focus viewing area 1b may be formed by matching the base arc surface 21 with a portion other than the central area of the optical surface 11 .

In some examples, the diameter of the distance viewing zone 1a may be selected based on the size of the pupil. In other examples, the distance viewing zone 1a may have a diameter of 3 mm to 3.5 mm. Thereby, it can better fit with the pupil. For example, the diameter of the distance viewing zone 1a is 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm or 3.5 mm.

In some examples, when the pupil is constricted at distance, the light passes through the distance vision zone 1a and then enters the center of the retina through the pupil, so that distance vision can be corrected; when near vision, the pupil is dilated to be able to use the defocus zone outside the distance vision zone 1a 1b, the light passing through the defocused visual area 1b becomes a myopic defocused light and then enters the peripheral retina through the pupil, so that the hyperopic defocusing of the peripheral retina becomes myopic defocusing, thereby inhibiting the growth of the eye axis, thereby controlling or slowing down the progression of myopia. deepen.

In some examples, the diopter of the contact lens 1 may be progressive. For example, the diopter of the contact lens 1 may be gradually reduced or gradually increased. In addition, in some examples, the diopter of the contact lens 1 may be progressive from the boundary line of the distance vision zone 1a and the defocus vision zone 1b to the outer edge of the defocus vision zone 1b. Thereby, peripheral defocus can be formed.

In some examples, the diopter of the contact lens 1 may be graded from the distance viewing zone 1a to the defocus viewing zone 1b. In this way, the contact lens 1 can have the effect of myopia and defocusing, so that the progression of myopia can be controlled or slowed down, and at the same time, the demand for vision correction can be met.

In some examples, the absolute value of the diopter of the contact lens 1 may gradually decrease from the distance viewing zone 1a to the defocus viewing zone 1b. In addition, in some examples, the absolute value of the diopter of the through-focus viewing zone 1b may gradually decrease from the boundary of the distance viewing zone 1a and the through-focus viewing zone 1b to the outer edge of the de-focusing viewing zone 1b.

In some examples, the absolute value of the diopter of the distance viewing zone 1a may gradually decrease from the center of the distance viewing zone 1a to the edge of the distance viewing zone 1a. Additionally, in some examples, the diopter of the distance viewing zone 1a may not change.

In some examples, the central viewing zone may be the near viewing zone and the outer viewing zone may be the far viewing zone. Thereby, the contact lens 1 can be used for correction of hyperopia.

In some examples, as shown in Figure 7, the contact lens 1 may include a marginal zone 1c. In other examples, the edge region 1c may be formed around the outer viewing region. For example, the edge region 1c may be formed around the out-of-focus viewing region 1b. In addition, in some examples, as shown in FIG. 7 , the edge region 1 c may be formed by matching the peripheral surface 12 with the base arc surface 21 .

In some examples, the thickness of the edge region 1c may gradually increase away from the central viewing region. Thereby, the limbal region 1c can help support the contact lens 1 to be worn on the cornea 2 . For example, the thickness of the edge region 1c may gradually increase as the distance from the distance viewing region 1a increases, in other words, the thickness between the peripheral surface 12 and the base camber surface 21 gradually increases as approaching the base camber surface 21 .

In some examples, as shown in FIG. 7 , the contact lens 1 may further include an edge warping region 1d. In other examples, the edge warp region 1d may be formed around the edge region 1c. In addition, in some examples, as shown in FIG. 7 , the edge warping region 1d may be formed by matching the peripheral surface 12 with the edge arc surface 22 .

In some examples, the thickness of the edge warped region 1d may gradually decrease away from the edge region 1c. Thereby, it is possible to contribute to the progress of lacrimal fluid exchange.

According to the present invention, a contact lens 1 that is well matched with the cornea 2 can be provided.

Although the present invention has been specifically described above with reference to the accompanying drawings and embodiments, it should be understood that the above description does not limit the present invention in any form. Those skilled in the art can modify and change the present invention as required without departing from the essential spirit and scope of the present invention, and these modifications and changes all fall within the scope of the present invention.

Claims (10)

1. A contact lens, characterized in that, an outer surface having a convex shape, the outer surface consisting of a centrally located optical surface and a peripheral surface surrounding the optical surface, the optical surface having a curvature less than the curvature of the peripheral surface; and The inner surface is concave, and the inner surface is composed of a base arc surface that is in contact with the cornea and provides an optical correction effect and an edge arc surface formed around the base arc surface, and the edge arc surfaces are respectively connected with the peripheral surface. connected to the base arc surface, the base arc surface has a curvature smaller than that of the peripheral surface, the base arc surface has a curvature greater than the curvature of the anterior surface of the cornea, and The inner surface is quadrant-specific, and the inner surface is quadrant-zoned designed to match the morphology of the different quadrants of the cornea. 2. The contact lens of claim 1, wherein: The base camber is divided into 4 quadrants for quadrant partition design, and the side camber is divided into 4 quadrants for quadrant partition design. 3. The contact lens of claim 1, wherein: The contact lens is fitted based on the corneal curvature and corneal astigmatism values of the cornea. 4. The contact lens of claim 1, wherein: The diameter of the base arc surface is larger than the diameter of the optical surface. 5. The contact lens of claim 1, wherein: The corneal contact lens is composed of a rigid high oxygen permeability material, and the rigid high oxygen permeability material is one selected from the group consisting of siloxane methacrylate, fluorosilicone methacrylate, perfluoroether, and fluorinated siloxane. kind. 6. The contact lens of claim 1, wherein: When the contact lens is worn on the eyeball, a tear fluid space is formed between the inner surface and the cornea. 7. The contact lens of claim 1, wherein: In the contact lens, the thickness between the peripheral surface and the basal camber surface gradually increases as it approaches the basal camber surface. 8. The contact lens of claim 1, wherein: The front surface is defocused to form a multifocal contact lens. 9. The contact lens of claim 1 or 8, wherein: The contact lens has a distance vision zone and a defocus vision zone. 10. The contact lens of claim 1 or 8, wherein: The contact lens has a progressive diopter.

Images