Iolab Corporation

David S Akhavi

Richard W Cudworth

John R Kniffin

An optic for an intraocular lens with finished, molded radii on the anterior and posterior edges of the peripheral surface of the optic. The optic has a thin central optical zone and a surrounding annular ring having sufficient material to support haptics. The ring is thicker than the optical zone and, thus, recesses the posterior surface of the optical zone to provide a capsulotomy space. The present novel optic is produced by novel molding pins which are shaped to provide the finished molded radii on the edges of the optic so that the optic requires little or no post-molding finishing or polishing other than the degating and deflashing.

Process of molding an optic for an intraocular lens

Molded optic for an intraocular lens

A fixture for holding an optical lens during processing which includes a first lens holder having a lens-covering surface and an exterior surface and a second lens holder with a lens-covering surface and an exterior surface. The lens-covering surfaces are placed over the confronting surface of a lens, and the entire assembly is clipped together so that it may be subjected to the manufacturing processes, for example abrasive tumbling to round the exposed edges of the lens.

Method for tumble grinding optical lens edge

A universal anterior chamber lens having an optic with bores entering into the edge of the optic at points spaced circumferentially apart about 180.degree.. The optic is supported in the anterior chamber by haptics, each of which have a first end fixed to the optic, a first leg extending from the optic to the peripheral anatomy of the eye, a second leg extending transverse to the optic in contact with the anatomy of the eye and a third leg extending back toward the optic. The first leg includes a concave spring-like section extending toward the third leg. The free end of the third leg extends into the bore provided in the optic so that as the haptics compress, the free end of the haptic can ride freely in the optic bore. A locking mechanism holds the free end of the haptic in the bore.

Anterior chamber lens

A process and apparatus for dissipating static electrical charge that may build up on the small plastic parts, the tumbling medium or the tumbling chamber itself during an abrasive tumbling process and cause the parts to be repelled out of the abrasive medium. A flow of ionized gas is distributed about the tumbling chamber, discharges the parts and provides a mechanical action to return the parts to the abrasive medium. This flow of ionized gas dissipates the static charge.

Method and apparatus for dissipating static charge from an abrasive

Fixture for holding an optical lens during tumbling

A method and apparatus for forming a round end on a small plastic filament which includes a die having a channel extending into one side with a hemispherical interior end and a bore extending into the other side and coaxially aligned with the channel and having a conic interior end. The tip of the conic section communicates with the hemispherical section. A relief recess is spaced from the periphery of the hemispherical section by a land portion. The peripheral edge of the land portion, which also forms the edge of the channel, may be formed into a knife edge. In the die the filament is cold-formed to provide a hemispherical section spaced apart from the distal end of the filament. Material displaced during the cold-forming process is deposited in a relief section extending peripherally about the channel. When the cold-formed filament is removed from the die, the portion of the filament distal of the hemispheric portion is cut off and discarded, and the flash and displaced material is removed from the filament by abrasive tumbling.

Growing community of inventors

Westwood, CA, United States of America

David S Akhavi