Date of Award

5-2002

Degree Type

Thesis

Degree Name

Master of Science in Vision Science

Committee Chair

J.P. Lowry

Abstract

Non-cycloplegic autorefraction or retinoscopy are often performed during vision screenings and eye care missions to obtain a quick refraction for all age groups. In an attempt to compare the accuracy of autorefraction and retinoscopy, under noncycloplegic conditions, the results of five papers examining non-cycloplegic and cycloplegic autorefraction and four papers examining non-cycloplegic and cycloplegic retinoscopy are analyzed. It was found that non-cycloplegic autorefraction can underestimate hyperopia by up to 8.00 D, and non-cycloplegic retinoscopy usually underestimates hyperopia by no more than 2.00 Din children due to poorly controlled accommodative response. Autorefraction results, especially those obtained without the use of a cycloplegic, should not be used for prescriptive purposes with children. Autorefraction without cycloplegia has been shown to be reasonably accurate for determination of astigmatic power and axis in all age groups.

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Optometry Commons

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