Method and apparatus for examination of visual acuity

Details Method and apparatus for examination of visual acuity Method and apparatus for examination of visual acuity

1990-10-17

1992-07-14

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351242, 351246, A61B 302

Patent

active

051297205

ABSTRACT:
A method and apparatus for measuring visual acuity utilizes an apparatus having two rotating charts. The two rotating charts are mounted within a housing which has a window in the front thereof. The housing is illuminated and the charts are placed upon plastic rotating disks which transmit light. The disks are rotated independent of each other in order that one chart may be viewed through the window in the apparatus. Adjacent the window are a series of LEDs which serve to indicate to the patient which line of the optotypes on the chart is to be read. At the bottom of the device there is a display which indicates the number of the line being read and the visual acuity that this represents. The activation of the indicators and the rotation of the disks are controlled via a wireless remote control.

REFERENCES:
patent: 1852837 (1932-04-01), Desmond et al.
patent: 2340760 (1944-02-01), Leland
patent: 2770999 (1956-11-01), Older

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