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Clinical evaluation of the Shin‐Nippon SRW‐5000 autorefractor in adults
Author(s) -
Mallen E. A. H.,
Wolffsohn J. S.,
Gilmartin B.,
Tsujimura S.
Publication year - 2001
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.2001.00585.x
Subject(s) - autorefractor , optometry , repeatability , refractive error , medicine , accommodation , refraction , subjective refraction , ophthalmology , optics , eye disease , mathematics , statistics , physics
Summary A clinical evaluation of the Shin‐Nippon SRW‐5000 (Japan), a newly released commercial autorefractor, was undertaken to assess its repeatability and validity compared to subjective refraction. Measurements of refractive error were performed on 200 eyes of 100 subjects (aged 24.4±8.0 years) subjectively (non‐cycloplegic) by one optometrist and objectively with the SRW‐5000 autorefractor by a second. Repeatability was assessed by examining the differences between the seven autorefractor readings taken from each eye and by re‐measuring the objective prescription of 50 eyes at a subsequent session. Although the SRW‐5000 read slightly more plus than subjective refraction (mean spherical equivalent +0.16±0.44 D), it was found to be highly valid (accurate) compared to subjective refraction and repeatable over the prescription range of +6.50 to −15.00 D examined. The Shin‐Nippon SRW‐5000 autorefractor is therefore a valuable complement to subjective refraction and as it offers the advantage of a binocular open field‐of‐view, has a great potential benefit for accommodation research studies.