Contact lens and method of making the same

Details Contact lens and method of making the same Contact lens and method of making the same

1979-08-28

1982-03-09

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351160R, 351177, G02C 704

Patent

active

043185959

ABSTRACT:
A contact lens, particularly a high minus power anterior surface toric lens, is made having a toric central optical portion without prism and an annular outer portion having prism but without toric effect, the outer portion being truncated in a lower part so that there is upward movement of the center of rotation of the blank and of the center of gravity in a manner such that the center of gravity is in use below the center of rotation, thus assisting if the lens is rotated by lid or eye movement the lens tends to rotate back into correct orientation.

REFERENCES:
patent: 3698802 (1972-10-01), Baron
Kemmet Muller, Hermann, "On the Improving of Vision by Means of Contact Lenses in Cases of Astigmatism", Contacts, Mar. 1976, p. 5+.
Braff, Dolan M.; A New Corneal Lens Design for the Correction of Residual Astigmatism, The Optometric Weekly, Jan. 1920, pp. 24-25.

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