Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1979-12-10
1983-08-30
Evans, F. L.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
G02C 704
Patent
active
044013728
ABSTRACT:
This invention concerns a minus prescription hydrogel contact lens that permits oxygen diffusion to the cornea in sufficient quantity to avoid the effects of oxygen deprivation; avoids the physiological complications arising from damage to the bulbar conjunctivia due to compression of the limbal capillaries; and avoids corneal scleral or wetting deficiencies. These advantages are accomplished through a combination of lens design and hydrogel properties.
REFERENCES:
patent: 3985697 (1976-10-01), Urbach
Knoll, H. A.; "Progress Report on Softlens Contact Lenses", Reprinted From a Speech Given at Ohio State University, 9/27/68.
Korb Donald R.
Mancini William L.
Refojo Miguel F.
Evans F. L.
Hirsch Joseph I.
Peters Howard M.
Sugarman Scott J.
Syntex (U.S.A.) Inc.
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