An Optical System For An Automatic Eye Refractor

C. R. Munnerlyn

doi:10.1117/12.955881

21 November 1977 An Optical System For An Automatic Eye Refractor

C. R. Munnerlyn

Proceedings Volume 0126, Clever Optics: Innovative Applications of Optics; (1977) https://doi.org/10.1117/12.955881
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

Abstract

Various instruments to measure the refractive state of the eye have been built based on a servosystem concept. This paper describes the optical system of the Dioptron^® automatic objective refractor. This auto-refractor measures the modulation of a grating image formed on the retina while being controlled by a digital computer. The optical subsystems include the image projecting system, the image detecting system, the patient fixation target, and the patient alignment system. Accuracy is obtained by controlling the patient's accommodation and eliminating "instrument" myopia. The overall system is designed to be compact while maintaining very good signal to noise ratio and minimum operator controls.

Citation Download Citation

C. R. Munnerlyn "An Optical System For An Automatic Eye Refractor", Proc. SPIE 0126, Clever Optics: Innovative Applications of Optics, (21 November 1977); https://doi.org/10.1117/12.955881

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