Contact lenses providing improved visual acuity

Details Contact lenses providing improved visual acuity Contact lenses providing improved visual acuity

1996-12-05

1998-09-29

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351160R, 351160H, G02C 704

Patent

active

058152393

ABSTRACT:
A method for obtaining contact lenses having optimized visual acuity involves providing the anterior surface or the posterior surface of the contact lens with a conic section having a shape factor value within the range of about 0.3 to 2.0, the shape factor value being selected so as to adjust spherical aberration in the central optical zone to a value within the range of about -0.2 diopter to about -0.6 diopter and to a value that provides optimal visual acuity.

REFERENCES:
patent: 3482906 (1969-12-01), Volk
patent: 3933411 (1976-01-01), Winner
patent: 4195919 (1980-04-01), Shelton
patent: 4199231 (1980-04-01), Evans
patent: 5050981 (1991-09-01), Roffman
patent: 5220359 (1993-06-01), Roffman

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