Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1988-03-07
1989-07-25
Arnold, Bruce Y.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
51284R, 351160H, 351177, G02C 704, G02C 706, B24B 100
Patent
active
048506893
ABSTRACT:
A near vision contact lens has a generally elliptical body of concavo-convex cross-sectional configuration with interior and exterior curvatures providing the desired power from the bottom to the extreme upper edge. The rounded ends of the body are so positioned that the major axis of the lens body is spaced substantionally above the lower edge of the lens body, and the rounded ends of the lens body provide a lateral positional stability as the eyes roll downwardly and converge, and each lens rides from the outer flatter lower periphery of the cornea up onto the more highly curved corneal cap with composite downward and inward rotation of the eyeball.
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Bier, N.; "Prescribing for Presbyopia with Contact Lenses"; Am. Jour of Optometry and Archives of Amer. Academy of Optometry; vol. 44, No. 11; Nov. 1967; pp. 687 and 704-706.
Dickinson, F; "The Ultracon Prism Bifocal"; The Optician; vol. 140, No. 3636; Dec. 9, 1960; pp. 549-551.
Akiyama, K; "Study of Contact Lenses for Presbyopia"; Contacto; vol. 4, No. 5; May 1960; pp. 149-152.
Hensley L. Edward
Martin Bruce W.
Arnold Bruce Y.
Martin Bruce A.
Sugarman Scott J.
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