Fabrication of an intraocular lens
AssigneeWright Medical, Inc.
InventorLarry W. Blake
Life of this patent
Estimating the term…
Abstract
A lens, having an optical power surface, which may have multiple radii portions or aspherical portions as well as spherical portions, is molded in a coined mold. A pair of core pins, positioned within the mold cavity during the lens forming process, will produce a pair of haptic-mounting holes within the lens. As the lenses are subsequently tumbled to remove flash, indentations will form adjacent to the haptic-mounting holes. These indentations allow for tangential attachment of the haptic to the lens which, in turn, enables maximum flexibility without exceeding the width of the optic.
Claims39
A method of making optical molds having an optical power surface within the mold cavity, comprising the steps of:
- forming a reverse mold configuration on a surface of a first material;
- treating said first material to form a hardened coining mandrel;
- polishing said surface of said coining mandrel to produce an optical finish;
- and
- pressing said coining mandrel into a blank formed of a second material which is softer than said coining mandrel.
Dependencies are inferred from the claim text.