Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1986-09-02
1988-09-20
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351206, 362 32, 356124, A61B 310, A61B 314, G01B 900
Patent
active
047721154
ABSTRACT:
A device for causing concentric circles of illuminated light to be reflected from the human cornea. The device includes a cylindrical surface which is open at both ends. At one end the eye looks into the cylinder of the device and at the other end a camera or observer can view the illuminated rings on the cornea. The cylinder is advantageously made of transparent plastic or glass having an opaque coating. A lamp box is affixed to an uncoated portion of the device. The coating of the cylindrical surface through is interrupted to define clear rings on the cylindrical surface which light from the lamp box is conducted to be reflected from the cornea.
REFERENCES:
patent: 3598478 (1971-08-01), Townsley
"New Photo Keratoscope Utilizing a Hemispherical Object Surface", by Henry A. Knoll et al, Journal of the Optical Society of America, vol. 47, #3, p. 221.
Gersten Martin
Mammone Richard J.
Zelvin Joseph
Bovernick Rodney B.
Computed Anatomy Incorporated
Popper Howard R.
Ryan Jay P.
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