Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1985-11-25
1988-03-01
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351160H, G02C 704
Patent
active
047281820
ABSTRACT:
A bi-focal contact lens having a first lens portion for distance viewing, a second lens portion for near viewing and capable of being shifted, on the eyeball, between a first position in which the first lens portion is seated and centered on the cornea and a second position in which the second lens portion is seated and centered on the cornea.
REFERENCES:
patent: 3431327 (1969-03-01), Tsuetaki
Corbin John K.
Sternberg Henry
Sugarman Scott J.
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