Vision correction equipment with metasurface structure and correction method thereof

Abstract

The invention discloses vision correction equipment with a metasurface structure and a correction method thereof. The vision correction equipment with the metasurface structure comprises wearable glasses type equipment and signal processing equipment, wherein the wearable glasses type equipment comprises lenses, a fatigue detection device, a control function area and a control button; and each lens comprises a lens based on a surface structure and a controllable liquid crystal grating, the lens based on the surface structure can realize various focal lengths on the same plane through simple processing, and the controllable liquid crystal grating can flexibly adjust a light transmission area. Based on the combination of the surface structure-based lens and the controllable liquid crystal grating, the focal length-adjustable lens can be obtained in a simple processing mode at low cost, so the cost of vision correction equipment is reduced.

Description

technical field [0001] The invention relates to the field of vision health, in particular to a vision correction device with a metasurface structure and a correction method thereof. Background technique [0002] Many people today need to pay attention to electronic display screens for a long time. Coupled with the popularity of smart phones, most people have become heads-down people. They stare at the mobile phone screen whenever they have free time. And focusing the line of sight on specific objects at close range will cause the human body to spasm the ciliary muscle that adjusts the focal length of the line of sight. In the long run, it will affect the ability of the ciliary muscle to adjust the lens, making the ability of the two eyes to focus the line of sight decline, resulting in irreversible vision Damage, and ultimately the deterioration of vision has become a common problem faced by people today. [0003] In the prior art, two methods are mainly used to realize the...

AI Technical Summary

Problems solved by technology

[0002] Many people today need to pay attention to electronic display screens for a long time. Coupled with the popularity of smart phones, most people have become heads-down people. They stare at the mobile phone screen whenever they have free time. And focusing the line of sight on specific objects at close range will cause the human body to spasm the ciliary muscle that adjusts the focal length of the line of sight. In the long run, it will affect the ability of the ciliary muscle to adjust the lens, making the ability of the two eyes to focus the line of sight decline, resulting in irreversible vision Injury, eventually leading to the deterioration of vision has become a common problem faced by people today

[0003] In the prior art, two methods are mainly used to realize the training of the ciliary muscle: 1) the focal length of the image is changed through the zoom lens, but the price of the zoom lens is relatively expensive, and the structure of the whole training equipment is relatively complicated; 2) through the liquid crystal based The zoom lens or multi-focal lens can change the focal length of the user's line of sight, but the manufacturing cost of the zoom lens or multi-focal lens is high, the focal length adjustment ability is weak, and the use scene has certain limitations.

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