Vision tester

Details Vision tester Vision tester

1999-06-21

2000-05-16

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

A61B 302

Patent

active

060626925

ABSTRACT:
A vision tester comprises a slide projector for projecting a visual indication chart onto a curved display screen via a mirror rotated by a motor. The center of curvature of the curved display screen substantially coincides with the subject's eye. The rotation of the mirror causes an image of the visual indicator to be moved across the screen in a specific direction. When the subject provides a response to the moving image, the speed of image movement at the time of the response is detected and stored in a memory. The average of a plurality of such measurements is used to determine the subject's dynamic visual acuity.

REFERENCES:
patent: 3891311 (1975-06-01), Fletcher et al.
patent: 4740072 (1988-04-01), Griffin et al.
patent: 5325136 (1994-06-01), Salibello et al.

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