Clinical evaluation of the Shin-Nippon SRW-5000 autorefractor in adults

E.A.H. Mallen, J.S. Wolffsohn, B. Gilmartin, S. Tsujimura

Research output: Contribution to journalArticlepeer-review


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±0.44D), it was found to be highly valid (accurate) compared to subjective refraction and repeatable over the prescription range of +6.50 to -15.00D 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. Copyright © 2001 The College of Optometrists.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalOphthalmic and Physiological Optics
Issue number2
Publication statusPublished - Mar 2001


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