Ophthalmic measuring apparatus

Details Ophthalmic measuring apparatus Ophthalmic measuring apparatus

1989-03-03

1989-11-07

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, A61B 310

Patent

active

048787507

ABSTRACT:
An ophthalmic measuring apparatus has a corneal shape measuring system projecting a first target image onto the cornea of an eye to be examined and receiving the corneal reflection image of the first target image by a first photodetector device to obtain information on the corneal shape, a refractive power measuring system projecting a second target image onto the eye fundus of the eye to be examined and receiving the corneal reflection image of the second target image by a second photodetector device to obtain information on the refractive power of the eye, a signal processing device selectively receiving the output of the corneal shape measuring system or the refractive power measuring system to calculate the corneal shape or the refractive power of the eye, and a measuring mode selecting device connected to the signal processing device to select a single measurement of the corneal shape of refractive power of the eye, or successive measurements of both.

REFERENCES:
patent: 4312574 (1982-01-01), Wilms
patent: 4431278 (1984-02-01), Nohda

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