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NASA NTRS · 19870015441

Photorefractor ocular screening system

Abstract

A method and apparatus for detecting human eye defects, particularly detection of refractive error is presented. Eye reflex is recorded on color film when the eyes are exposed to a flash of light. The photographs are compared with predetermined standards to detect eye defects. The base structure of the ocular screening system is a folding interconnect structure, comprising hinged sections. Attached to one end of the structure is a head positioning station which comprises vertical support, a head positioning bracket having one end attached to the top of the support, and two head positioning lamps to verify precise head positioning. At the opposite end of the interconnect structure is a camera station with camera, electronic flash unit, and blinking fixation lamp, for photographing the eyes of persons being evaluated.

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BibTeXRIS

Richardson, John R., Kerr, Joseph H.. 1987-06-02. Photorefractor ocular screening system. https://ntrs.nasa.gov/citations/19870015441

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