Claims
- 1. A hydrophilic oxygen permeable contact lens having a front surface that is not to be in contact with the cornea of a human eye when said contact lens is worn on said human eye, said hydrophilic oxygen permeable contact lens being produced by a method comprising the steps of:
- preparing an aqueous solution containing, as a hydrophilicity rendering material, 0.05-25% by weight of a surface active agent whose number average molecular weight is in the range of 400-100,000, said surface active agent being obtained by chemically bonding using alkali an end amino group of a hydrolyzed collagen to fatty acid chloride;
- coating at least said front surface of an oxygen permeable contact lens with said surface active agent, by contacting said contact lens with said aqueous solution containing said surface active agent as said hydrophilicity rendering material;
- irradiating said contact lens whose front surface has been coated with said surface active agent, with ultraviolet rays; and
- drying said contact lens which has been irradiated with said ultraviolet rays.
- 2. The hydrophilic oxygen permeable contact lens of claim 1, wherein said aqueous solution containing said hydrophilicity rendering material further contains alcohol.
- 3. The hydrophilic oxygen permeable contact lens of claim 2, wherein said alcohol is ethanol.
- 4. The hydrophilic oxygen permeable contact lens of claim 1, said method further comprising a step of effecting a preliminary treatment selected from the group consisting of: corona discharge treatment; plasma discharge treatment; and a treatment using a strong acid.
Priority Claims (2)
Number |
Date |
Country |
Kind |
6-283169 |
Nov 1994 |
JPX |
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7-239623 |
Sep 1995 |
JPX |
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Parent Case Info
This is a Continuation of application Ser. No. 08/738,578 filed Oct. 29, 1996, now U.S. Pat. No. 5,708,050, which in turn is a Rule 62 division of Ser. No. 08/559,161 filed Nov. 13, 1995, now abandoned.
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5527925 |
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Jun 1996 |
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2139455 |
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WOX |
Divisions (1)
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Number |
Date |
Country |
Parent |
559161 |
Nov 1995 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
738578 |
Oct 1996 |
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