Optometry & Vision Science

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Optometry & Vision Science:
Articles: Original Article

Comparisons of the Handheld Autorefractor, Table-Mounted Autorefractor, and Subjective Refraction in Singapore Adults

FAROOK, MOHAMED DipOptom; VENKATRAMANI, JAYANT MBBS; GAZZARD, GUS MA(Cantab), FRCOphth; CHENG, ANGELA BSc; TAN, DONALD MBBS, FRCOph; SAW, SEANG-MEI MBBS, PhD

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Abstract

Purpose. The purpose of this article was to compare the Retinomax with the table-mounted autorefractor and subjective refraction in Singapore adults.

Methods. Adults (n = 100) attending a tertiary eye hospital clinic were examined by an optometrist. First, subjective refraction testing was performed using a trial lens set, followed by handheld autorefractor tests using the Nikon Retinomax and the table-mounted autorefractor (Topcon RM8000B). Spherical equivalent and vector components of astigmatism were analyzed: J0 (Cartesian astigmatism) and J45 (oblique astigmatism).

Results. The Retinomax autorefractor readings (mean = −4.69 D) were more minus compared with the table-mounted autorefractor (mean = −4.05 D) and subjective refraction (mean = −3.90 D). There were significant differences in J0 and J45 for comparisons between subjective refraction and Retinomax autorefraction, and table-mounted autorefraction and Retinomax autorefraction.

Conclusion. The Retinomax autorefractor measures were more minus compared with the table-mounted autorefractor and subjective refraction. The Retinomax autorefractor is not recommended for research purposes, unless in remote inaccessible areas where a portable instrument is necessary and cycloplegia is not possible.

© 2005 American Academy of Optometry

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