Oxygen permeable contact lens having high durable hydrophilic su

Details Oxygen permeable contact lens having high durable hydrophilic su Oxygen permeable contact lens having high durable hydrophilic su

1996-10-29

1998-01-13

Merriam, Andrew E. C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523106, 427 212, 427 224, 427489, 264 127, 264 132, 264 17, 528 33, 528 41, C08J 704, G02B 104, A61L 2700

Patent

active

057080500

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.

REFERENCES:
patent: 4594401 (1986-06-01), Takahashi et al.
patent: 5002582 (1991-03-01), Guire et al.
patent: 5148311 (1992-09-01), Beavers et al.
patent: 5409751 (1995-04-01), Nakagawa et al.
patent: 5527925 (1996-06-01), Chabrecek et al.

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