Eye testing device

Details Eye testing device Eye testing device

1982-01-27

1984-06-05

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351222, A61B 302

Patent

active

044525150

ABSTRACT:
An improved eye testing apparatus is provided which permits the operator thereof to precisely and clearly designate certain characters of the eye test pattern. The device includes an external stage, a duplicate test pattern on the stage, and a mask having separate designation locations for designating a character of the test pattern at a vision station within the device while simultaneously designating an identical character of the duplicate test pattern.

REFERENCES:
patent: 1669916 (1928-05-01), Smith
patent: 1949067 (1934-02-01), Wheelock et al.
patent: 3012472 (1961-12-01), Feinberg et al.
patent: 4027954 (1977-06-01), Good

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