Hard intraocular lens with the shape memory

Details Hard intraocular lens with the shape memory Hard intraocular lens with the shape memory

1989-03-31

1990-08-07

Frinks, Ronald

Prosthesis (i.e., artificial body members), parts thereof, or ai

Eye prosthesis

Intraocular lens

523106, 525937, A61F 216

Patent

active

049464701

ABSTRACT:
A hard introcular lens having shape memory consisting of a copolymer having a glass transition temperature (T.sub.g) from 40.degree. C. to 60.degree. C. that is deformable into the shape of a straight or bent rod with a diameter of 1 to 4 mm at a temperature above its T.sub.g temperature and cooled to fix the deformation for insertion into the human eye through a small incision. After insertion into the eye the deformed lens will soften and relax to its original undeformed shape by elevating its temperature with a rinsing solution above 40.degree. C. and will maintain its final shape after a subsequent temperature reduction at normal body temperature of about 37.degree. C. whereby the lens becomes a hardened lens.

REFERENCES:
patent: 4384097 (1983-05-01), Wingler et al.
patent: 4578504 (1986-03-01), Hammar
patent: 4731079 (1988-03-01), Stoy

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