Alignment system for keratograph

Details Alignment system for keratograph Alignment system for keratograph

1991-12-16

1993-05-18

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351212, 351247, A61B 314, A61B 310

Patent

active

052125050

ABSTRACT:
An alignment system for use with a keratoscope to form an eye measurement system uses a source of a light beam which is directed towards a cornea. A reflection from that beam is supplied to first and second quadrant detectors which are connected to circuits to generate an output when the cornea is properly aligned. Upon proper alignment, the system triggers the calculation of the cornea shape by the keratoscope.

REFERENCES:
patent: 4750489 (1988-06-01), Berkman
patent: 4812033 (1989-03-01), Ishikawa

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