Intraocular lens with fracture resistant haptics
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United States of America Patent
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-
Oct 7, 1997
Grant Date -
N/A
app pub date -
Feb 26, 1996
filing date -
Jul 28, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The polymethyl methacrylate (PMMA) or copolymer thereof used to produce one-piece intraocular lenses is modified by a compression molding process to produce a much tougher material with improved mechanical properties. The process takes material in rod form and compresses into lens blanks. The molded lens blanks receive little or no compression strain in the center 4 mm optic zone. The compression is limited to the periphery region outside the center 4 mm zone. The intraocular lens fabricated from the molded lens blank exhibits greatly increased haptic mechanical properties and resistance to breakage.
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