Radiation-protection filtering contact lenses and production method therefor

A technology for contact lenses and production methods, applied in the directions of glasses/goggles, optics, optical components, etc., can solve the problems of low ultraviolet light protection performance, unsightly appearance, and reduced light brightness of sunglasses, and achieves protection against photochemical damage and moisture. The effect of good rate and good oxygen transmission coefficient

Inactive Publication Date: 2013-10-30
北京自然美光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current contact lenses have been accepted by many people. Wearing contact lenses can achieve the effect of lightness, beauty, fashion, and correcting vision without deformation. However, they are all made of materials that cannot filter out ultraviolet light and short-wave light. The ultraviolet light protection of contact lenses The performance is not high, and it does not have the light con

Method used

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  • Radiation-protection filtering contact lenses and production method therefor
  • Radiation-protection filtering contact lenses and production method therefor
  • Radiation-protection filtering contact lenses and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Hydroxyethyl methacrylate: 90 parts;

[0071] n-vinylpyrrolidone: 10 parts;

[0072] Ethylene glycol dimethacrylate: 0.3 parts;

[0073] Azobisisobutyronitrile: 0.15 parts;

[0074] 0.7 parts of azophenyl methacrylate.

[0075] The method for making a contact lens using the contact lens material of this implementation may include the following steps in turn:

[0076] Step (1) making a half-mold: making a convex mold, the curvature of the inner side of the bottom is the same as that of the contact lens, as a forming mold for the contact lens.

[0077] The half-mold making process includes:

[0078] (1) Drying of raw materials: Put an appropriate amount of PBT granular raw materials into a dryer for drying and then take them out for use;

[0079] (2) Injection molding machine preparation: connect the power supply of the injection molding machine, turn on the power supply, make the injection molding machine barrel and injection molding heating part reach the required ...

Embodiment 2-5

[0103] Embodiment 2-5 carries out the same operation as embodiment 1 except that the proportioning ratio of components is changed, and the results are shown in Table 1.

[0104] Table 1

[0105]

[0106]

Embodiment 6-10

[0108] Embodiment 6-10 carries out the same operation with embodiment 1 except that the proportioning ratio of components is changed, and the difference between embodiment 6-10 and embodiment 1-5 is to use 2-(2'-hydroxyl-5' -ethyl (isoacrylate) phenyl)-2H-benzotriazole instead of azophenyl methacrylate, the results are shown in Table 2.

[0109] Table 2

[0110]

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PUM

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Abstract

Provided is a contact lens material. The material is characterized by comprising liquid raw materials, by weight, 90-100 parts of hydroxyethyl methylacrylate, 10-12 parts of n-vinyl pyrrolidone, 0.3-0.4 part of ethylene glycol dimethacrylate, 0.15-0.2 part of azodiisobutyronitrile and 0.7-1 part of yellow UV absorbents for contact lenses. The contact lenses have good oxygen permeation coefficient, good moisture content, moderate hardness and less residual components, and have functions of good ultraviolet protection and filtration of purple light and blue light.

Description

technical field [0001] The invention relates to a contact lens material and a manufacturing method thereof. On the basis of the traditional manufacturing technology of the contact lens, the optical properties of the contact lens are changed by adding new substances. [0002] The invention adopts a novel light control technology, which can effectively control short-wave purple light and blue light components with a wavelength below 450NM in addition to the function of filtering out ultraviolet light. The optical performance of the present invention enables the contact lens to effectively protect against photochemical damage to eye tissue by light radiation. Background technique [0003] As we all know, ultraviolet light can not only kill viruses, but also cause great damage to human skin and eyes, such as keratitis and cataracts caused by light radiation; at the same time, there are short-wave components such as purple light and blue light in visible light that can cause seri...

Claims

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Application Information

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IPC IPC(8): C08F220/28C08F226/10C08F222/14C08K5/23C08K5/3475G02B1/04G02C7/04B29C45/00
Inventor 周振宇
Owner 北京自然美光学有限公司
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