Abstract: The disclosure relates to syringes which include a substantially rigid, hollow syringe body, a plunger and a flexible, finger-conformable grip, guard, collar or collet which are disposed about one end thereof.
Type:
Grant
Filed:
November 19, 1992
Date of Patent:
April 23, 1996
Assignee:
Dennis T. Grendahl
Inventors:
Dennis T. Grendahl, Fritz D. Harnsberger
Abstract: The ultraviolet screening of a silicone rubber intraocular lens can be enhanced by the addition of an optical brightener. The optical brightener also serves to reduce any apparent yellow tint that may occur. The optical brightener is incorporated into the preformed silicone lens by immersing it in a solution containing the optical brightener and an ultraviolet screening agent.
Abstract: An ultraviolet screening agent can be incorporated into a preformed silicone rubber intraocular lens by bringing it into contact with a solution which contains the agent in a higher concentration than the lens material.
Abstract: Method and apparatus for manual or semiautomatic computer controlled laser staking of a haptic to an optic of an intraocular lens. An Nd:YAG laser with a HeNe laser aiming beam provides laser power to a fiber optic multiplexer to deliver laser energy to a plurality of staking work stations where the haptics are melted or fused to a lens optic. A fiber optic laser stylus is brought in close proximity with a haptic and optic for application of laser power to fuse or join the haptic to the optic in a cylindrically fused fashion, producing no surface wound and effectively sealing the haptic hole.
Abstract: A color ringed or rimmed edge intraocular lens for implant in either the anterior chamber, the posterior chamber or the cornea of the eye. The lens has a colorless or clear central region of a material such as polymethylmethacrylate (PMMA) and a peripheral surrounding portion of a dark material such as blue PMMA. Polysulfone can also be utilized. The lens can be fabricated by passing a clear rod of optical quality PMMA through an extrusion orifice and coating the circumference of the rod with a layer of predetermined thickness of colored, preferably blue PMMA or other compatible material. Other methods of fabrication can include the introduction of a suitable dye into the outer regions of the rod, or joining the clear central region to a ring of colored material by thermal adhesive bonding or other known processes.