Ocular refracting power measuring system

Details Ocular refracting power measuring system Ocular refracting power measuring system

1989-11-29

1991-12-10

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, A61B 300

Patent

active

050712454

ABSTRACT:
An ocular refracting power measuring system includes a projector system for projecting the image of a light source on the eyeground of an eye to be tested and a light receiving system for condensing the light beam from the eyeground onto a light receiving element disposed at a position substantially conjugate with the pupil of the eye to be tested, whereby the ocular refracting power of the eye to be tested can be measured based on the distribution of light amount on the light receiving element and variations of the distribution of light amount due to the changed amount of light in the light source.

REFERENCES:
patent: 4293198 (1981-10-01), Kohayakawa et al.
patent: 4306778 (1981-12-01), Wada et al.
patent: 4376573 (1983-03-01), Matsumura et al.
patent: 4878750 (1989-11-01), Sekiguchi
patent: 4952049 (1990-08-01), Matsumoto

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