Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1981-09-28
1985-04-02
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351161, 351176, G02C 704
Patent
active
045084360
ABSTRACT:
A soft toric contact lens having spherocylindrical power for correcting astigmatism in humans and utilizing a prism ballast as a means of maintaining correct axial orientation. The degree of prism is greater than 1.0 diopter, and the peripheral outer surface of the lens is tapered off to a relatively thin edge of constant thickness over a substantial portion of the ballast area.
REFERENCES:
patent: 4095878 (1978-06-01), Fanti
patent: 4324461 (1982-04-01), Salvatori
"Correcting Astigmatism with the Hydron.RTM. Toric Hydrophilic Contact Lens", Alan J. Touch, 20/20, Jul./Aug., 1979.
Corbin John K.
Eberhardt Wayne R.
Frontier Contact Lenses of Florida, Inc.
Sugarman Scott J.
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