Ophthalmic instrument

Details Ophthalmic instrument Ophthalmic instrument

1986-04-10

1987-07-07

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, 354 62, A61B 314, A61B 310

Patent

active

046782974

ABSTRACT:
An ophthalmic instrument for effecting eye measurement with an eye-measuring target mark projected onto an eye to be examined, includes a photodetector provided at a position optically conjugate with the position of the corneal reflection image of the eye-measuring target mark to thereby determine the quality of the accuracy of alignment with the eye to be examined.

REFERENCES:
patent: 4357079 (1982-11-01), Karasawa
patent: 4365872 (1982-12-01), Nunokawa
patent: 4436389 (1984-03-01), Sano
patent: 4453808 (1984-06-01), Takahashi et al.
patent: 4511227 (1985-04-01), Nunokawa et al.

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