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Blue light-blocking soft contact lens, and method for manufacturing same

A soft contact lens, contact lens technology, applied in glasses/goggles, optics, optical components, etc., can solve the problems of blue light blocking efficiency decrease, contact lens exudation, and light transmittance reduction.

Inactive Publication Date: 2019-07-23
MEDIOS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In protective films for spectacle lenses or display devices, the main technology used is to add brown or orange dyes as colorants to absorb and block blue light, or to alternately coat materials with high refractive index and materials with low refractive index to reflect, block Wavelengths in the region corresponding to blue light, but this technology is difficult to apply to contact lenses
Of course, the colorant can be added to the monomer composition capable of producing contact lenses to exert the blue light blocking effect, but this method not only reduces the overall transmittance in the blue light region, but also in the visible light wavelength region. , the problem of decreased visibility will occur, the general coloring agent is the type that is simply dispersed in the monomer composition, and does not induce chemical bonding, and the problem of bleeding from the contact lens will occur over time
In addition, photochromic dyes can also be used to reflect ultraviolet and blue light cutting effects. Photochromic dyes can be, for example, spiropyran compounds, spirooxazine compounds, thioindigo compounds, triarylmethane compounds, etc. If this compound is exposed to Ultraviolet rays will change the molecular structure and bring color. It is usually transparent, but if exposed to ultraviolet rays, it will take on a gray or brown series of dark colors. There is a problem of reduced visibility, and indoors, there is a problem of reduced blue light blocking efficiency due to low photochromic properties

Method used

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  • Blue light-blocking soft contact lens, and method for manufacturing same
  • Blue light-blocking soft contact lens, and method for manufacturing same
  • Blue light-blocking soft contact lens, and method for manufacturing same

Examples

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preparation example Construction

[0041] The preparation method of the soft contact lens for blocking blue light of the present invention comprises the following steps:

[0042] The step of preparing a contact lens composition comprising a hydrophilic acrylate monomer, a crosslinking agent, and an initiator;

[0043] The step of adding a specific compound having the following chemical structural formula (1) or chemical structural formula (2) in the above-mentioned contact lens composition;

[0044] A step of injecting the composition into a mold for forming a contact lens;

[0045] a step of heat-treating the contact lens molding mold injected with the composition;

[0046] the step of separating the shaped contact lens from the mold;

[0047] The steps of wetting and disinfecting the contact lens;

[0048] The step of packing and sterilizing the contact lens.

[0049]The hydrophilic acrylate monomer can be used in one or more hydrophilic monomers such as 2-hydroxyethyl methacrylate, N-vinylpyrrolidone, N,...

Embodiment 1

[0064] The chemical structural formula (2) is 2-{4-[(E)-phenylazo]phenoxy}ethyl-2-acrylate (2-{4-[(E)-phenyldiazenyl]phenoxy}ethyl- 2-acrylate).

[0065] 96.8 parts by weight of 2-hydroxyethyl methacrylate as a hydrophilic acrylate monomer, 1 part by weight of ethylene glycol dimethacrylate as a crosslinking agent, and 2,2'-azo After 0.2 parts by weight of diisobutyronitrile are uniformly mixed, add the specific compound 4-[(E)-phenylazo]phenyl-2-acrylate methyl ester (4-[(E)- phenyldiazenyl] phenyl-2-methacrylate) 2 parts by weight, stirred at room temperature for 30 minutes, so that it was uniformly dissolved, and a soft contact lens composition with blue light blocking function was prepared.

[0066] After pouring the above prepared composition into the mold made of polypropylene made by our company, heat treatment is carried out at 60°C for 8 hours, and at 120°C for 4 hours to complete the cross-linking of the composition. Sodium chloride 0.9% by weight saline is immerse...

Embodiment 2

[0068] 88.3 parts by weight of 2-hydroxyethyl methacrylate as a hydrophilic acrylate monomer, 10 parts by weight of N-vinylpyrrolidone, 1 part by weight of ethylene glycol dimethacrylate as a crosslinking agent, and as an initiator After uniform mixing of 0.2 parts by weight of 2,2'-azobisisobutyronitrile, the specific compound 2-{4-[(E)-phenylazo]phenoxy}ethane with chemical structural formula (2) was added Base-2-acrylate (2-{4-[(E)-phenyldiazenyl]phenoxy}ethyl-2-acrylate) 0.5 parts by weight, stirred at room temperature for 30 minutes, dissolved evenly, and prepared a soft Sexual contact lens composition.

[0069] Then, the manufacture of contact lenses is carried out in the same manner as in Example 1. For the soft contact lenses with the function of blocking blue light manufactured in the above steps, the transmittance in the ultraviolet and visible light regions is measured, and the following results are obtained: image 3 As shown in the spectral distribution curve, th...

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Abstract

The present invention provides a method for manufacturing a blue light-blocking soft contact lens, and to a method for reducing the transmittance of blue light passing through a contact lens by addinga specific compound capable of allowing blue light (blue light having a wavelength in the range of 380-500 nm) to be absorbed in a monomer composition capable of manufacturing a soft contact lens. According to the present invention, a blue light-blocking soft contact lens, which is expected to have an effect of preventing glare, fatigue, eye diseases and the like, can be manufactured.

Description

technical field [0001] The present invention relates to a method for preparing soft contact lenses with the function of blocking blue light. A method of manufacturing a contact lens. Background technique [0002] As we all know, light is composed of ultraviolet rays, visible rays, and infrared rays. Visible rays belong to the region with a wavelength of 380nm to 780nm. The region with shorter wavelengths is ultraviolet rays, and the region with longer wavelengths is infrared rays. Among them, light in the longer wavelength region such as red light, yellow light, and green light is not particularly harmful, but ultraviolet rays with shorter wavelengths will have harmful effects on human skin or eyes. Therefore, various methods have been proposed to block ultraviolet rays. This method has been commercialized, but the harmfulness or blocking method of blue light corresponding to the short-wavelength region of visible rays has recently become known and commercialized. Blue lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D11/00G02C7/04B29L11/00
CPCG02C7/04B29D11/00038B29D11/00125G02B1/043B29D11/00634
Inventor 朴宰演
Owner MEDIOS
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