Contact lens capable of retarding vision change

Abstract

The invention provides a contact lens capable of slowing vision change, an optical zone of the contact lens comprises a vision correction zone capable of enhancing vision and a vision adjustment zone surrounding the periphery of the vision correction zone, and the vision correction zone enables an imaging light beam to pass through a central fossa on the retina of an eye in a manner close to parallel light so as to obtain clearer vision. When a user sees more clearly, the pressure of the pressing ball can be relieved, and when the image plane focused by the vision adjusting area is arc-shaped and is different from the radian of the retina of the eye, the change of the myopia vision can be stabilized, and the two methods are adopted to tend to slow the change of the vision.

Description

Technical Field

[0001] The invention relates to a contact lens capable of slowing down vision changes, in particular to a contact lens for vision correction. Background Art

[0002] The main cause of myopia is the variation of the optical structure of the eyeball. Due to the prevalence of various electronic, electrical and 3C products, the age at which schoolchildren develop myopia has decreased year by year. As schoolchildren age, their eyeballs also continue to grow. When the eyeball grows excessively, the image falls in front of the retina and myopia is formed.

[0003] People's eyes usually have positive spherical aberration, which makes the focal point outside the center of the retina usually fall behind the retina. When looking at close objects, the eyes often use the contraction of the ciliary muscles to make the lens more capable of focusing light, so that they can focus and see more clearly. Therefore, long-term close-up habits will cause the ciliary muscles to be overused, and the eyeball will feel pressure. Myopic patients often have high intraocular pressure, and high intraocular pressure also forces the eye axis to grow, which is one of the possible causes of myopia.

[0004] In view of this, the inventor has accumulated many years of experience in this field, conducted careful research and continuously tested and improved, and now has finally invented a contact lens that can slow down vision changes, eliminating the shortcomings of existing products and improving the effect. Summary of the invention

[0005] The main purpose of the present invention is to provide a contact lens that can slow down vision changes, mainly to provide adequate vision correction within 5 degrees of retinal imaging viewing angle, and to increase the distance between the peripheral focal points outside 5 degrees and the retina in a continuous and progressive manner, thereby relieving eye pressure and achieving the effect of slowing down vision changes.

[0006] To achieve the above-mentioned purpose, the present invention provides a contact lens that can slow down vision changes. The contact lens includes an optical zone, the center of which is a vision correction zone that enhances vision. The vision correction zone is used to make the focus of light present a diffuse circle effect, so that the imaging light beam passes through the fovea on the retina of the eye in a manner close to parallel light, so as to obtain clearer vision and achieve the effect of relaxing the ciliary muscle of the eyeball. The periphery of the vision correction zone is a continuously changing vision adjustment zone, and the image plane focused by the vision adjustment zone is arc-shaped. When the arc is different from the curvature of the retina of the eye and is in front of the retina, it is used to stabilize the changes in myopic vision, and when it is behind the retina of the eye, it is used to stabilize the changes in hyperopic vision.

[0007] Optionally, the vision correction zone and the vision accommodation zone have their own independent variable indexes for separate control, and when the degree of the vision correction zone is controlled, the change of the degree of the vision accommodation zone will not be affected.

[0008] In order to have a further understanding of the present invention, the present invention is described in detail with reference to the accompanying drawings as follows: BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic plan view of the contact lens capable of slowing down vision changes according to the present invention.

[0010] Figure 2 The figure is a schematic diagram of the contact lens of the present invention which can slow down the change of vision.

[0011] Figure 3 It is a schematic diagram of the light refraction process of the contact lens of the present invention that can slow down the change of vision.

[0012] Figure 4 The diagram is a schematic diagram of the light transfer process of the contact lens capable of slowing down vision changes according to the present invention.

[0013] The following are marked in the figure:

[0014] 100-Contact lenses

[0015] 10-Optical zone

[0016] 11-Vision Correction Area

[0017] 12-Vision Accommodation Zone

[0018] 13-Front arc curve

[0019] 14-Backward arc curve

[0020] 15-Refractive Index

[0021] 16-Center thickness DETAILED DESCRIPTION

[0022] The contact lens that can slow down vision changes provided by the present invention mainly controls the refractive power distribution of the optical zone of the lens to increase the vision correction area range for the optical zone. Therefore, the present invention does not limit the refractive power distribution of the peripheral part. In fact, the vision adjustment area of ​​the peripheral part can provide different optical designs according to product requirements.

[0023] See also Figure 1The contact lens 100 of the present invention that can slow down the change of vision comprises an optical zone 10, the center of which is a vision correction zone 11. The vision correction zone 11 is used to make the focus of light present a circle of confusion effect, so that the imaging light beam passes through the fovea on the retina of the eye in a manner close to parallel light, so as to obtain clearer vision and achieve the effect of relaxing the ciliary muscle of the eyeball. The periphery of the vision correction zone 11 is a continuously variable vision adjustment zone 12. The image plane focused by the vision adjustment zone 12 is arc-shaped. The arc is different from the curvature of the retina of the eye and is used to stabilize the change of myopia vision when it is in front of the retina, and is used to stabilize the change of hyperopia vision when it is behind the retina of the eye. The vision correction zone 11 and the vision adjustment zone 12 have their own independent variable indexes that can be controlled separately. When controlling the degree of the vision correction zone 11, the change of the degree of the vision adjustment zone 12 will not be affected.

[0024] There is a depression less than two millimeters in the center of the retina of the human eye, which is called the fovea. It is located just opposite to the crystalline body. There are densely clustered cones in this depression. In addition to being responsible for the color vision of the human eye, the cones are also the most sensitive to light and the clearest vision. Whenever people look at an object, their eyes will have a gaze phenomenon, which is to project the image of the object onto this position in order to obtain a clear image. Considering that the fovea is a depression, the present invention designs the vision correction area 11 in the center of the lens to enhance vision. It must be able to cover the outside of the fovea, and also pass the light path through this area in a manner that is approximately parallel light, which is different from the light focusing on only one point. This method can ensure that vision is fully corrected. Since the vision correction area 11 in the center of the lens is different from the vision adjustment area 12, there is an effect of enhancing vision without vision adjustment, so that vision is fully corrected. When the eyeball can form a clearer image, the ciliary muscle will no longer be overexerted, thereby achieving the effect of relieving intraocular pressure and preventing vision from deteriorating further.

[0025] See also Figures 2 to 4According to the present invention, the front curve 13 of the vision correction area 11 and the vision accommodation area 12 in the center of the contact lens 100 having the vision enhancement function can be obtained by using the ray tracing y-nu method of geometric optics and the quadratic equation that can describe the axisymmetric conical surface; wherein the four specifications that determine the refractive power of the lens are the front curve 13, the back curve 14, the refractive index 15 and the center thickness 16. When the specifications of the back curve 14, the refractive index 15 and the center thickness 16 of the contact lens 100 are determined, and then the power curve and the front and rear object distance range are set, the calculation of the refraction process (refracted porocedure) and the transfer process (transfer porocedure) are repeatedly repeated by using the ray tracing y-nu method to obtain the front curve 13.

[0026] in:

[0027] Refraction process:

[0028] n ′ μ ′ =nμ+yc(n ′ -n);

[0029] Transfer process:

[0030]

[0031] Quadratic equation:

[0032]

[0033] cv = 1 / rd, rd is the radius of curvature;

[0034] r 2 =x 2 +y 2 ;

[0035] Since light is reversible, the object-image relationship in an optical system is interchangeable, that is, if the image is regarded as the object, the image formed after the light passes through the system from right to left is the original object. Therefore, the present invention can determine the shape of the imaging surface, that is, the refractive power distribution curve plus the front and rear object distance, and then the coordinate points on the front arc curve 13 of the contact lens 100 can be obtained through ray tracing of the above-mentioned refraction process and transfer process and calculation of the quadratic equation.

[0036] In summary, the contact lens of the present invention that can slow down the change of vision comprises an optical zone, the center of which is a vision correction zone containing vision enhancement, the vision correction zone mainly allows the focus of the light to present a circle of confusion effect, so that the imaging light beam passes through the fovea on the retina of the eye in a manner close to parallel light, so as to obtain clearer vision and achieve the effect of relaxing the ciliary muscle of the eyeball, the periphery of the vision correction zone is a continuously changing vision adjustment zone, the image plane focused by the vision adjustment zone is arc-shaped, when the arc is different from the curvature of the retina of the eye and is in front of the retina, it is used to stabilize the change of myopia vision, and when it is behind the retina of the eye, it is used to stabilize the change of hyperopia vision. Its practical effect is beyond doubt, and the present invention has never been made public or seen in other publications, which actually complies with the provisions of the Patent Law, and an invention patent application is filed in accordance with the law. Although some specific embodiments of the present invention have been described in detail through examples, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present invention. It should be understood by those skilled in the art that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

1. A contact lens capable of slowing down vision changes, characterized in that: The contact lens comprises an optical zone, the center of which is a vision correction zone, which is used to make the focus of light present a diffuse circle effect so that the imaging light beam passes through the fovea on the retina of the eye in a manner close to parallel light, and the periphery of the vision correction zone is a continuously changing vision adjustment zone, the image plane focused by the vision adjustment zone is arc-shaped, and the arc shape is different from the curvature of the retina of the eye and is used to stabilize the changes in myopic vision when it is in front of the retina, and is used to stabilize the changes in hyperopic vision when it is behind the retina of the eye.

2. The contact lens capable of slowing down vision changes according to claim 1, characterized in that: The vision correction zone and the vision accommodation zone have their own independent variable indexes for separate control. When the degree of the vision correction zone is controlled, the change of the degree of the vision accommodation zone will not be affected.

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