Intra-ocular lens

• US 4,955,900 A
• Filed: 06/09/1989
• Issued: 09/11/1990
• Est. Priority Date: 06/10/1988
• Status: Expired due to Fees

• Current Assignee: Menicon Company Limited
• Original Assignee: Menicon Company Limited, Nitto Denko Corporation
• Inventors: Inoue, Sunao, Hino, Atsushi, Nakajima, Toshio, Higashi, Kazumi
• Primary Examiner(s): Frinks, Ronald
• Application Number:
  US07/363,694
• Time in Patent Office: 459 Days
• Field of Search: 623/6, 623/5, 528/185
• US Class Current: 623/6.56
• CPC Class Codes: A61F 2/16 Intraocular lenses
• CPC Class Codes: A61F 2002/1681 having supporting structure for lens, e.g. haptics
• CPC Class Codes: A61F 2002/16965 Lens includes ultraviolet absorber
• CPC Class Codes: A61L 2430/16 for reconstruction of eye parts, e.g. intraocular lens, cornea
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08G 73/105 with oxygen only in the diamino moiety
• CPC Class Codes: C08G 73/1064 containing sulfur
• CPC Class Codes: C08L 79/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: G02B 1/041 Lenses

Abstract

An intra-ocular lens comprising a lens part and a fixing part is disclosed, said lens part comprising a colorless transparent polyimide consisting mainly of a repeating unit represented by formula (I): ##STR1## The intra-ocular lens exhibits compatibility with the organism, chemical inactivity, and insusceptibility to modification or deterioration by the organism, has a refractive index of 1.6 or higher, completely absorbs ultraviolet rays while exhibiting substantial transparency to visible rays, and possesses heat resistance enough to withstand autoclaving.

Claims

1. An intra-ocular lens comprising a lens part and a fixing part, said lens part comprising a colorless transparent polyimide consisting mainly of a repeating unit represented by formula (I):

##STR11##

2. An intra-ocular lens as claimed in claim 1, wherein said polyimide contains at least 80 mol% of the repeating unit represented by formula (I).

3. An intra-ocular lens as claimed in claim 1, wherein said polyimide contains at least 95 mol% of the repeating unit represented by formula (I).

4. An intra-ocular lens as claimed in claim 1, wherein said fixing part comprises a colorless transparent polyimide consisting mainly of the repeating unit represented by formula (I), said fixing part and lens part being integrally molded.