Glare tester

Details Glare tester Glare tester

1992-10-19

1997-09-23

Nguyen, Thong

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351213, 351214, 351217, A61B 302, A61B 310

Patent

active

056710399

ABSTRACT:
A glare tester suitable for use with conventional subjective refractors for testing visual acuity is disclosed. The tester may be fitted to new refractors or retrofitted to existing refractors. The preferred tester is a plastic annular ring with a plurality of LEDs mounted in recesses to direct light toward the test axis and a surface to reflect the LED light toward the patient's eye. A coating on the ring surface opposite the patient's eye improves the LED efficiency.

REFERENCES:
patent: 1806318 (1931-05-01), Tillyer
patent: 3498699 (1970-03-01), Wilkinson
patent: 4550990 (1985-11-01), Trispel et al.
patent: 4764007 (1988-08-01), Task
patent: 4800404 (1989-01-01), Ginsburg et al.
patent: 5281984 (1994-01-01), Burlow et al.

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