Method of making intraocular and contact lens constructions

Details Method of making intraocular and contact lens constructions Method of making intraocular and contact lens constructions

1983-06-29

1984-09-25

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156643, 156645, 156646, 156652, 1566611, 156663, 156668, 430321, B44C 122, C03C 1500, C03C 2506, B29C 1708

Patent

active

044734344

ABSTRACT:
The invention contemplates effectively integral lens-and-haptic structure and a technique of making the same, using composite laminated sheet material as the only ingredient of the ultimate product, which may be an intraocular implant or for extraocular (i.e., cornea-contact) application. The composite sheet material is of substantially the combined ultimate thickness of the lens and haptic, one of the laminations being of a material destined to be substantially only the lens component, and another of the laminations being of a material destined to be substantially only the haptic component. The lens-component lamination may be of optical-quality glass or of a transparent plastic which is inert to body fluids. Suitably coordinated masking and etching steps determine the contour of the ultimate central circular lens as well as the thickness and fenestration detail of the ultimate thin flexible haptic formations which are integral with and extend radially outward of the lens blank. Lens-surface curvature may be developed by conventional grinding techniques or by die compression, as appropriate.

REFERENCES:
patent: 3959527 (1976-05-01), Droege
patent: 4116753 (1978-09-01), Tojyo et al.

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