Contact lenses with angular orientation and stabilization

Details Contact lenses with angular orientation and stabilization Contact lenses with angular orientation and stabilization

1978-12-29

1980-07-08

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 704

Patent

active

042114764

ABSTRACT:
A contact lens is constructed with an anterior surface which is radially unsymmetrical and a posterior surface which is composed of multiple curves. The lens is designed to properly adhere and center on the cornea. An aperture or hole is formed in the peripherally located curves, for locally enabling an increase in the magnitude of the fluid forces acting upon the lens. In a properly constructed contact lens, this increase in the fluid forces acting upon the lens creates an effect for tightening the lens fit in the sector of the lens which contains the aperture or hole. Clinically, this sector tightening effect has a magnitude which is capable of holding a properly tailored contact lens, stable in a specifically desired vertical orientation.

REFERENCES:
patent: 3187338 (1965-06-01), Neefe
patent: 3822089 (1974-07-01), Wichterle
Kikkawa, "The Mechanism of Contact Lens Adherence and Centralization", Am. J. of Optometry and Archives, vol. 47, No. 4, Apr. 1970, pp. 275-281.
Jessen, G. N., "Physiological Considerations in the Design of Internal and External Surfaces of Fluidless Scleral Contact Lenses", Am. J. of Optometry and Archives, vol. 46, No. 4, Apr. 1969, pp. 308-311.

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