Soft contact lens with flattened region for automatic orientatio

Details Soft contact lens with flattened region for automatic orientatio Soft contact lens with flattened region for automatic orientatio

1976-11-22

1978-06-20

Clark, Conrad J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02B 523

Patent

active

040958787

ABSTRACT:
A soft contact lens for use on the human eye formed from a soft material like silicon or a hydrophilic material. The lens has a generally spherical concave inner surface which conforms to the cornea and a generally convex outer surface. To maintain the correct orientation of the lens when placed on the eye it is provided with a flattened region along a portion of its periphery.

REFERENCES:
patent: 3228741 (1966-01-01), Becker
patent: 3238676 (1966-03-01), Borish
patent: 3660545 (1972-05-01), Wichterle
patent: 3698802 (1972-10-01), Baron
patent: 3940207 (1976-02-01), Barkdoll
Jessen, Article in American Journal of Optometry & Archives Apr. 1969, pp. 308-311.

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