Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1987-07-02
1989-03-07
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351247, A61B 310
Patent
active
048100854
ABSTRACT:
A corneal configuration measuring apparatus is disclosed. It comprises target projecting means for projecting target beams from a plurality of targets towards a cornea of an eye to be tested, light receiving means, measuring optical system for projecting the target beams reflected on the cornea towards the light receiving means and forming target reflection images on the light receiving means, and variable power optical system for varying imaging power of the target reflection images to be formed on the light receiving means.
REFERENCES:
patent: 2733634 (1956-02-01), Littman et al.
patent: 3639043 (1972-02-01), Townsley
patent: 3640610 (1972-02-01), Nupuf
patent: 4660946 (1987-04-01), Nakamura
Arai Akihiro
Fukuma Yasufumi
Oana Yoshinori
Bovernick Rodney B.
Tokyo Kogaku Kikai Kabushiki Kaisha
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