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Composite contact lens and production method for lens material

A technology for contact lenses and lens materials, applied in the directions of glasses/protective glasses, glasses/goggles, optics, etc., can solve problems such as lens breakage, and achieve the effects of preventing breakage, reducing breakage, and improving durability.

Active Publication Date: 2007-11-21
HOYA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] As mentioned above, although conventional compound contact lenses have the good wearing feeling unique to flexible contact lenses and the excellent optical properties unique to hard contact lenses, the performance of the junction of the central hard part and the peripheral soft part The problem is not enough to solve the problem of breakage when handling the lens

Method used

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  • Composite contact lens and production method for lens material
  • Composite contact lens and production method for lens material
  • Composite contact lens and production method for lens material

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0120]First, in a mixture comprising 44% by weight of 2-hydroxyethyl methacrylate, 35% by weight of 2-methoxyethyl acrylate, 20% by weight of methyl methacrylate, and 1% by weight of ethylene glycol dimethyl 0.1% by weight of 2,2'-azobisisobutyrocyanide as a polymerization initiator was added to the monomer mixture of acrylate acrylate, and stirred to dissolve it.

[0121] Next, using [PA-100AT] produced by Kyoto Denshi Measurement Co., Ltd., the mixed solution was poured into the following polymerization vessel, which was cylindrical in shape, with an inner diameter of 17 mm, made of polypropylene, and output at 50 W , a vacuum degree of 0.6 Torr, a reaction gas of Ar, and a treatment time of 120 seconds for plasma treatment. After the polymerization container was sealed, it was placed in a hot air circulation dryer, kept at 40°C for 48 hours, kept at 80°C for 6 hours, and then naturally cooled to room temperature to obtain the peripheral polymer (soft material 32).

[0122...

no. 2 example

[0130] In Example 2, a composite contact lens was obtained in the same manner as in Example 1 except that the angle of inclination provided in the cavity of the peripheral material was changed to α=35°, and the evaluation was also the same as in Example 1.

no. 3 example

[0132] Including 46% by weight of 2-hydroxyethyl methacrylate, 38% by weight of 2-methoxyethyl acrylate, 15% by weight of 2,2,2-trifluoroethyl methacrylate, and 1% by weight 0.1% by weight of 2,2'-azobisisobutyrocyanide as a polymerization initiator was added to the monomer mixture liquid of ethylene glycol dimethacrylate, and stirred to dissolve it.

[0133] Next, using [HV-2010] manufactured by TANTEC Corporation, the mixed liquid was poured into the following polymerization vessel, which was cylindrical in shape with an inner diameter of 17 mm, made of polypropylene, and spherical with a tip of 6 mm in the atmosphere. The electrodes were subjected to corona discharge treatment inside the polymerization container under the conditions of a set voltage of 24 kV, a set output of 51 W, and a treatment time of 5 seconds. After the polymerization container was sealed, it was placed in a hot air circulation dryer, kept at 42°C for forty-two hours, at 80°C for six hours, and then na...

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PUM

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Abstract

To increase strength against pulling / tearing that occurs at a normal handling and that advances from the convex surface to the concave surface of a lens or from the concave surface to the convex surface in a shearing direction, and to improve an attaching feeling. A composite contact lens consisting of a hard material at the center and a soft material having a water containing property at the periphery, wherein the joining surface 3A between the central hard portion (1) and the peripheral soft portion (2) is constituted of a single conical surface so inclined that the diameter D1 of the hard portion (1) at a lens convex surface FC is larger than the diameter D2 of the hard portion (1) at a lens concave surface BC, and the inclination angle a of the conical surface is so set that an angle formed by the joining surface 3A and the concave surface BC is about 90 degrees. An annular protrusion (7) projecting forward with respect to the convex surface curve of an optical unit and forming a concentric circle with respect to the lens's optical axis L is formed on the joint portion (3) between the central hard portion (1) and the peripheral soft portion (2) on the lens convex surface FC side.

Description

technical field [0001] The present invention relates to a composite contact lens having a hard material in the central portion and a soft material in the peripheral portion, and a method for manufacturing a lens material for the composite contact lens. Background technique [0002] Contact lenses are usually divided into two categories: hard contact lenses and flexible contact lenses. Since hard contact lenses are made of hard plastic, they have good optical properties and can correct corneal astigmatism. However, because they are made of hard materials, they have the disadvantage of a strong foreign body feeling when worn. [0003] On the other hand, flexible contact lenses use soft plastic as their material, and are classified into two types of hydrophilic materials and non-hydrophilic materials. [0004] Almost all flexible contact lenses are made of hydrophilic materials. Flexible contact lenses made of hydrophilic materials are far more comfortable to wear than rigid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/04B29C39/02B29C39/26G02C13/00
CPCG02C7/04G02C2200/04B29C39/36G02C7/049B29C39/006B29D11/00048B29L2011/0041B29D11/00038B29C39/02B29C39/26G02C13/00
Inventor 庄司典幸
Owner HOYA CORP
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