Title:
HIGHLY WATER-ABSORPTIVE OPHTHALMIC LENS AND METHOD OF PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2004045750
Kind Code:
A
Abstract:
To provide a highly water-absorptive ophthalmic lens realizing excellent dimension stability without becoming cloudy even when freezing and thawing are repeated or it is exposed under the low temperature of about 5°C for a long period of time or the like, and a method for advantageously producing the highly water-absorptive ophthalmic lens with such excellent characteristics.
The highly water-absorptive ophthalmic lens whose water content is 73 to 84% is formed by polymerizing a polymerizable monomer composition which consists of vinyl acetate and diethylene glycol divinyl ether and saponifying the obtained copolymer.
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Inventors:
ICHIHARA SHINJI
Application Number:
JP2002202969A
Publication Date:
February 12, 2004
Filing Date:
July 11, 2002
Export Citation:
Assignee:
MENICON CO LTD
International Classes:
G02C7/04; A61L27/16; A61L27/50; B29C39/02; C08F2/00; C08F8/12; C08F218/08; G02B1/04; B29L11/00; (IPC1-7): G02C7/04; B29C39/02; C08F2/00; C08F8/12; C08F218/08
Attorney, Agent or Firm:
Michio Nakajima
Masahiro Nakashima
Masahiro Nakashima
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