Oxygen permeable contact lens having high durable hydrophilic surface and method for producing the same
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United States of America Patent
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Jan 13, 1998
Grant Date -
N/A
app pub date -
Oct 29, 1996
filing date -
Nov 17, 1994
priority date (Note) -
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Abstract
A hydrophilic oxygen permeable contact lens having a front surface which is not to be in contact with the cornea of a human eye when the contact lens is worn on the human eye, wherein at least the front surface of the contact lens is coated with a hydrophilicity rendering material which renders the front surface hydrophilic and which is selected from the group consisting of: (A) hydrophilic silicone oil which is represented by the formula given in the specification and whose viscosity at a temperature of 20.degree. C. is not higher than 5,000 centipoise; (B) polysaccharide or its derivative; and (C) denatured collagen whose average molecular weight is in a range of 400.about.100,000. Also disclosed is a method of producing the hydrophilic oxygen permeable contact lens.
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