Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1983-07-22
1986-10-21
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351177, G02C 704, G02C 706
Patent
active
046182292
ABSTRACT:
A ballasted multifocal contact lens has a vent for releasing constrictive pressure provided in its lower and ballasted portion. The vent has a surface which tapers from the anterior surface toward the posterior surface to allow the lens to be positioned below the inferior lid. A stabilizing portion is formed on the lens adjacent each side of the vent. The stabilizing portions engage the inferior lid and adjust the lens should it be rotated off axis.
REFERENCES:
patent: 3212097 (1965-10-01), Adler
patent: 3937566 (1976-02-01), Townsley
patent: 4297008 (1981-10-01), Woodford
patent: 4324461 (1982-04-01), Salvatori
patent: 4508436 (1985-04-01), Sitterle
"Dimple Contact Lenses", A. Tajiri--American Journal of Optometry & Archives, vol. 42, #4; 4/1965, pp. 248, 249.
Jacobstein Benjamin L.
Mestrits Thomas J.
Miller Murray
Bausch & Lomb Incorporated
Corbin John K.
Morgan DeWitt M.
Norton John S.
Sugarman Scott J.
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