Palm size autorefractor and fundus topographical mapping instrum

Details Palm size autorefractor and fundus topographical mapping instrum Palm size autorefractor and fundus topographical mapping instrum

1992-05-26

1994-07-12

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, 351246, A61B 310, A61B 300

Patent

active

053293223

ABSTRACT:
A schematic is disclosed for an optical instrument with a compact light path for incorporation to a hand held instrument for objective refraction of the eye. In particular, and after eye centering occurs, utilizing an eye examiner to patient sight path and an automated indication of centering using conventional Purkinje images, first and second light sources electronically bracket the patient's gross sphere. Thereafter, a light source array is registered on one or the other side of the determined gross sphere prescription and analyzed for astigmatism. There results a rapid objective refraction particularly useful with children whose limited attention span renders the use of more conventional autorefractors not practicable.

REFERENCES:
patent: 5157427 (1992-10-01), Humphrey

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