Photorefractor ocular screening system

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type

Patent

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Details

354 62, 351208, A61B 314, G03B 2900

Patent

active

046698361

ABSTRACT:
The invention relates to a method and apparatus for detecting human eye defects, particularly detection of refractive error. The invention operates by recording on color film the eye reflex which occurs when eyes are exposed to a flash of light. The photographs are compared with predetermined standards, to detect eye defects. As shown in FIGS. 1 and 2, the base structure of the ocular screening system (10) is folding interconnect structure (12), comprising hinged sections (14), (16), and (18). Attached to one end of structure (12) is head positioning station (24) which comprises vertical support (26), a head positioning bracket (28) having one end attached to the top of support (26), and two head positioning lamps (33) to verify precise head positioning. At the opposite end of interconnect structure (12) is a camera station (34) with camera (38), electronic flash unit (44), and blinking fixation lamp (46), for photographing the eyes of persons being evaluated.

REFERENCES:
patent: 3388646 (1968-06-01), Sullivan
patent: 3944342 (1976-03-01), Martinez
patent: 4208107 (1980-06-01), Oharek
patent: 4304483 (1981-12-01), Whitten
patent: 4394074 (1983-07-01), McMahon
patent: 4523820 (1985-06-01), Kaakinen

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