A Clinical Evaluation of the American Optical SR III Subjective Refractor

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Abstract
The American Optical SR III Subjective Refraction System is a recent addition to the vision care field. Subjective refractions were performed, using the SR III, on 275 eyes of 139 subjects (clinic patients, optometry students, staff members, and faculty members) and the results were compared to clinical refractive data. Although subjective refraction results were found to compare favorably to the clinical results, the instrument was found to be limited to the extent that there is no provision for binocular vision testing and no provision for near vision testing.

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