Eye measuring apparatus having signal processing means for calcu

Details Eye measuring apparatus having signal processing means for calcu Eye measuring apparatus having signal processing means for calcu

1996-04-22

2000-06-27

Dang, Hung Xuan

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, A61B 310

Patent

active

060798300

ABSTRACT:
An eye measuring apparatus which, even if it is of the portable type in which it is difficult to maintain alignment, can effect accurate measurement without requiring a high skill of operation includes a light projecting system for projecting a light beam onto an eye to be examined, a light receiving system for detecting the reflected light from the eye to be examined by a light detecting element, and signal processing means for calculating the eye information of the eye to be examined on the basis of the detection by the light detecting element. The signal processing means is effective to sequentially monitor the output from the light detecting element and indicate eye refraction information on the basis of the detection by the light detecting element when a predetermined light reception signal is obtained.

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patent: 5071245 (1991-12-01), Fukuma et al.
patent: 5144346 (1992-09-01), Nakamura et al.
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patent: 5231430 (1993-07-01), Kohayakawa
patent: 5237351 (1993-08-01), Kohayakawa et al.
patent: 5280313 (1994-01-01), Kohayakawa

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