Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1981-07-29
1983-09-06
Frinks, Ronald L.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
3 13, G02C 704, A61F 116
Patent
active
044025793
ABSTRACT:
The invention contemplates integral lens-and-haptic structure and a technique of making the same, using 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 sheet material is of substantially the ultimate thickness of the lens, and 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 before or after haptic formation.
REFERENCES:
patent: 2117770 (1938-05-01), Row
patent: 2644985 (1953-07-01), Crandon
patent: 4080709 (1978-03-01), Poler
patent: 4126904 (1978-11-01), Shepard
patent: 4149279 (1979-04-01), Poler
patent: 4158030 (1979-06-01), Stoyan
patent: 4206518 (1980-06-01), Jardon et al.
patent: 4242762 (1981-01-01), Tennant
patent: 4253199 (1981-03-01), Banko
Frinks Ronald L.
Lynell Medical Technology Inc.
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