Ophthalmologic apparatus with ease of operation

Details Ophthalmologic apparatus with ease of operation Ophthalmologic apparatus with ease of operation

1996-04-19

1997-11-18

Mai, Huy

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351245, A61B 314, A61B 300

Patent

active

056893256

ABSTRACT:
A measuring unit is mounted on a movable stage, which is movable in the right-left and front-rear directions relative to a fixed base stage. When an examiner moves the movable stage to the right or to the left by manipulating a joy stick, a micro switch detects that movement. Upon reception of a detection signal from the micro switch, a microcomputer allows power to be supplied to measurement circuits, to initiate a measurement mode. When judging that proper alignment has been established, the microcomputer automatically calculates a cornea shape. Measurement and calculation of a cornea shape are repeated until a standard deviation of measurement data falls within a given value. Upon completion of the measurement operation, the microcomputer stops the supply of power to the measurement circuits, to cancel the measurement mode.

REFERENCES:
patent: 5212507 (1993-05-01), Fujieda et al.
patent: 5406076 (1995-04-01), Mimura et al.
patent: 5589899 (1996-12-01), Maeda et al.

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