Apparatus for testing dark adaptation

Details Apparatus for testing dark adaptation Apparatus for testing dark adaptation

1989-09-19

1992-01-14

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351243, 351246, A61B 302

Patent

active

050804782

ABSTRACT:
Apparatus for testing dark adaptation comprises a test panel. Four test stimuli, comprising arrays of light emitting diodes, are arranged on the test panel around a fixation light emitting diode. Translucent covers are mounted over the arrays of light emitting diodes. Four switches to enable a subject to input the identity of a visible test stimulus are provided, each switch is operated by a button formed by a respective cover of the test stimuli. A test stimulus is randomly selected and switched on at a predetermined level of luminance. On a correct identification, another test stimulus is selected and switched on at a reduced level of luminance. The times from the commencement of the test until the various correct identifications are recorded, as are the corresponding level of luminance of the test stimuli.

REFERENCES:
patent: 2239164 (1941-04-01), Wigelsworth
patent: 3883234 (1975-05-01), Lynn et al.
patent: 3936162 (1976-02-01), Krakav et al.
patent: 4545658 (1985-10-01), Weiss
patent: 4558933 (1985-12-01), Murr
patent: 4634243 (1987-01-01), Massof et al.
patent: 4824237 (1989-04-01), Ratner et al.

Affiliated with

Also associated with

Rating

Apparatus for testing dark adaptation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for testing dark adaptation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for testing dark adaptation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-537080