Contact lens for intraocular observation

Details Contact lens for intraocular observation Contact lens for intraocular observation

1993-02-23

1994-10-25

Gluck, Richard E.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, A61B 300

Patent

active

053593723

ABSTRACT:
A contact lens for intraocular observation capable of optically recognizing an inner portion of an eyeball by contacting the contact lens on a surface of a cornea of an eye to be inspected through a light ray transmitted through an inner portion of the contact lens comprising: an optical path dividing member provided on an optical path for leading a light ray incident on the inner portion of the contact lens to the eye to be inspected for dividing a portion of the light ray on said optical path; and an index provided at a position approximately optically conjugate with a portion to be observed of the eye to be inspected on a divided optical path divided by the optical path dividing member. The portion to be observed and said index can optically be recognized by at least partially superposing a first image of the index on a second image of the portion to be observed.

REFERENCES:
patent: 3820879 (1974-06-01), Frisen
patent: 4134647 (1979-01-01), Ramos-Caldera
patent: 4367018 (1983-01-01), Abe
patent: 4439026 (1984-03-01), Wilms
patent: 4750829 (1988-06-01), Wise
patent: 5046836 (1991-09-01), Volk
patent: 5189450 (1993-02-01), Crossman et al.
patent: 5252998 (1993-10-01), Reis et al.
patent: 5255025 (1993-10-01), Volk

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