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Calibration of the Canon Autoref R-1 for continuous measurement of accommodation

By Brett A. Davis, Michael J. Collins and David A. Atchison

Abstract

The Canon Autoref R-1 is an infrared optometer which allows free-space viewing. Pugh and Winn described hardware modifications necessary to convert the Autoref R-1 from an instrument capable of taking single static measurements of the eye's accommodative (refractive) status to an instrument capable of continuous measurement of the accommodative status of the eye. We describe two methods of calibrating the Autoref R-1 for continuous measurement of accommodation for any individual eye. The assumptions and sources of error underlying these calibration techniques are discussed. We also describe further hardware modifications to simplify signal acquisition from the Autoref R-1

Topics: 111300 OPTOMETRY AND OPHTHALMOLOGY
Publisher: Blackwell Publishing
Year: 1993
DOI identifier: 10.1111/j.1475-1313.1993.tb00453.x
OAI identifier: oai:eprints.qut.edu.au:890
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