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US 4,307,043 AGranted
Method of attaching retention loops to an intraocular lens
AssigneeHeyer-Schulte Corporation
InventorsCharles P. Chase, Richard B. MacAnally
Life of this patent
Estimating the term…
Abstract
An optical section of an intraocular lens has a pair of spaced apart threaded recesses which are threadingly locked to threaded shank sections of an iris retention loop. The shank sections are integrally joined to such loop so each shank section acts as an anchor preventing a screwing movement of the other shank relative to the optical section. A method is described of expanding a shank section of a lens retention member in situ within a threaded or other undercut recess of an optical section of an intraocular lens.
Claims8
A method of making an intraocular lens comprising the steps of:
- (a) forming an optical section with a recess having at least one substantially enlarged undercut section;
- (b) forming a retention member having at least one integral rod-like shank section;
- (c) inserting the shank section of the retention member into the recess;
- (d) applying energy in the form selected from the group consisting of heat, pressure, and a combination thereof to the shank section until the shank section permamently expands in situ to create at least one substantially enlarged lateral protrusion fitting in the enlarged undercut section locking the retention member to the optical section.
1 more element
Dependencies are inferred from the claim text.