Title:
VISUAL ACUITY CORRECTING LENS
Document Type and Number:
Japanese Patent JPH04174414
Kind Code:
A
Abstract:
PURPOSE:To improve the transparency of a lens and prevent turbidity and heterogeneity by using a compound having two or more radical polymeric acrylic groups (or methacrylic groups) and a hydroxyl group in one molecule. CONSTITUTION:A lens is made of a compound (A) having at least two or more radical polymeric acrylic groups (including methacrylic groups) and a hydroxyl group in one molecule, hexamethylene diisocyanate (B), and a compound (C) co-polymerizable with the compound (A). To manufacture the lens, the compound (A), hexamethylene diisocyanate (B) and the compound (C) are mixed, the compound (A) and hexamethylene diisocyanate (B) are urethane-reacted into a radical polymeric monomer, and it is formed into the lens by the casting method via radical polymerization. A visual acuity correcting lens with excellent transparency and large shock strength can be obtained.
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Inventors:
ITO TOSHIYUKI
UNO KENJI
SESHIMA YASUJI
UNO KENJI
SESHIMA YASUJI
Application Number:
JP18349490A
Publication Date:
June 22, 1992
Filing Date:
July 11, 1990
Export Citation:
Assignee:
TOKYO CONTACT LENS RES INST
International Classes:
G02C7/02; C08G18/67; C08G18/73; G02B1/04; (IPC1-7): C08G18/67; C08G18/73; G02B1/04; G02C7/02
Attorney, Agent or Firm:
Takeshi Kikuchi (1 person outside)