Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate
2009-04-30
2010-10-12
Collins, Darryl J (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
Reexamination Certificate
active
07810925
ABSTRACT:
A contact lens having near vision and distance vision portions, the lens being movable on the eye between first and second positions, those positions corresponding with aligning the wearer's vision through the near vision and distance vision portions respectively. The lens is positionally stable on the eye in each of the two positions, and requires a force to be applied to the lens to move between the first and second positions. Preferably the lens has a back surface and a front surface, and said back surface has either one or two major back curve zones occupying a major portion of the lens back surface.
REFERENCES:
patent: 4728182 (1988-03-01), Kelman
patent: 5141301 (1992-08-01), Morstad
patent: 7004585 (2006-02-01), Lindacher
patent: 2003/0016331 (2003-01-01), Mandell
patent: 2004/072710 (2004-08-01), None
Brent Geoffrey Peter
Du Toit Renee
Ehrmann Klaus
Evans Simon Rodney
Falk Darrin Mark
Ambrose Robert
Collins Darryl J
Zhou Jian
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