Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1989-02-14
1989-10-31
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351221, A61B 310
Patent
active
048773212
ABSTRACT:
A slit lamp microscope for use in observing the cornea, crystalline lens and other tissues of an eye includes a scanning device for scanning the laser beam vertically and horizontally within a selected area of the eye to be examined to form thereon a slit image which illuminates the selected area. A regulating device is provided for regulating the intensity of the laser beam to a predetermined level depending upon the amount of light reflected from the eye. The scanning device is controlled to change its scanning area to make the selected area variable to thereby provide a slit image which is changeable in size.
REFERENCES:
patent: 3703176 (1972-11-01), Vassiliadis et al.
patent: 4213678 (1980-07-01), Pomerantzeff et al.
patent: 4741612 (1988-05-01), Birngruber
Ichihashi Tadashi
Kawamura Masunori
Adams Bruce L.
Bovernick Rodney B.
Dzierzynski P. M.
Kowa Company Ltd.
Wilks Van C.
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