Adjustable myopia correction controller

Abstract

The invention discloses an adjustable myopia correction controller which comprises two circular mirrors with clamp slots. The two mirrors are connected through a variable pitch mechanism, an adjustingscrew disk is fixedly connected to a left-handed bolt and a right-handed bolt by positioning screws, the lower surfaces of the mirrors are connected with semicircular spherical mirror supports, breathable guard rings are connected into the clamp slots of the mirrors in a sleeving manner, elastic balls are fixed into the mirror supports by the breathable guard rings and the mirrors and connected with inflation tubes, the inflation tubes are connected to inflatable balloons through inflation tee joints, limit columns with positioning functions are arranged at the edges of the upper ends and thelower ends of the mirrors and used for preventing excessive pressure applied to eyeballs and ensuring accurate pressing of the adjustable myopia correction controller at the center of a cornea. The adjustable myopia correction controller effectively meets the requirement of myopic patients for long sight and is simple in structure, and a portion contacting with a human body is harmless to the human body.

Description

technical field [0001] The invention relates to a myopia correction instrument, in particular to an adjustable myopia correction controller. Background technique [0002] Orthokeratology lenses originated in the United States in the 1960s, also known as the first generation of products, first invented by George jessen. It is a lens with a certain curvature made of light-transmitting material and placed in front of the cornea in the eyelid to achieve the purpose of correcting vision. However, it has not been clinically promoted. The main reasons are: 1. The use of PMMA (polymethyl methacrylate) is airtight and cannot be worn for a long time. It can only be worn for a short time during the day, and the effect is not ideal. 2. The radian of the lens design is single, and it is necessary to replace a series of ordinary hard contact lenses with gradual flatness to obtain a certain degree of improvement in naked eye vision. 3. Poor centering and easy to shift. After the displa...

AI Technical Summary

Problems solved by technology

The main reasons are: 1. PMMA is used as polymethyl methacrylate material, which is airtight and cannot be worn for a long time. It can only be worn for a short time during the day, and the effect is not ideal.

2. The lens design has a single curvature, and it is necessary to replace a series of ordinary hard contact lenses with gradual flatness to obtain a certain degree of improvement in naked eye vision

3. Poor centering, easy to shift

2. Due to poor cooperation of children and corneal damage caused by various dangerous actions, orthokeratology lenses are not suitable for children under the age of 8.

In the production process, no matter how exquisite the material is, no matter how advanced the technology is, it cannot be as perfect as its own mucous membrane and skin.

5. Although the lens of orthokeratology lenses is made of oxygen-permeable materials, the oxygen supply capacity cannot be compared with the natural oxygen supply capacity of the human body

6. Residual low-toxic substances; no material is completely inert, the composition of body fluids in the human body is very complex, and tears themselves are very active

7. The wearing process of orthokeratology lenses is complicated, the eyes feel strong after wearing, the wearing cost is high, the service life is short, sediment or external force damage occurs after the action of the human body, and the maintenance cost is high, etc.

8. The curvature of the orthokeratology lens is fixed, and the lens must be replaced when the vision is improved

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