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US 6,387,127 B1Granted
Foldable intra-ocular lens
OwnerWolfgang Müller-Lierheiminventor
Life of this patent
Estimating the term…
Abstract
An intraocular lens includes (1) a foldable optical lens part made of a copolymer; and (2) a harder haptic part. A high crosslinking of the copolymer of the lens part and of the haptic part results in a high stability against hydrolysis in a biological medium.
Claims8
An intraocular lens, comprising:
- a foldable optical lens part consisting of a hydroxyethyl methacrylate-methyl methacrylate copolymer;
- and
- a harder haptic part consisting of polymethyl methacrylate,
- wherein the copolymer of the optical lens part and the polymer of the haptic part are crosslinked to a three-dimensional matrix by a common cross-linking agent which is ethylene glycol dimethacrylate, and
- wherein the hydroxyethyl methacrylate in the copolymer of the optical lens part is at least 80 wt.-% and the methyl methacrylate is about 4 to 17 wt.-%.
2 more elements
A method of making an intraocular lens, said method comprising:
- placing a solution consisting of hydroxyethyl methacrylate and methyl methacrylate into a polymethyl methacrylate ring;
- polymerizing the solution, thereby forming a lens blank;
- and
- forming an intraocular lens part from said blank comprising a foldable optical lens part consisting of a hydroxyethyl methacrylate-methyl methacrylate copolymer, wherein the hydroxyethyl methacrylate is at least 80 wt.-% and the methyl methacrylate is about 4 to 17 wt.-%.
1 more element
Dependencies are inferred from the claim text.