Fixation sight apparatus for ophthalmologic instrument

Details Fixation sight apparatus for ophthalmologic instrument Fixation sight apparatus for ophthalmologic instrument

1986-06-16

1989-07-18

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

350602, A61B 300

Patent

active

048488992

ABSTRACT:
A fixation sight apparatus for an ophthalmological instrument is disclosed. It has a unique arrangement including light source and mirrors for presenting a plurality of fixation mark images on a measuring optical axis. An eye to be tested selectively fixedly gazes at the most clearly sightable one among the plurality of fixation mark images according to the sight confirmation characteristic thereof.

REFERENCES:
patent: 1834017 (1931-12-01), Carbonara
patent: 3493290 (1970-02-01), Traub
patent: 4173398 (1979-11-01), Okamoto et al.
patent: 4679917 (1987-07-01), Genco et al.

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