The repeatability and validity of dynamic retinoscopy in assessing the accommodative response

Authors: McClelland, J. F.; Saunders, K. J.

Source: Ophthalmic and Physiological Optics, Volume 23, Number 3, May 2003 , pp. 243-250(8)

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Abstract:

Dynamic retinoscopy (DR) is an objective technique that has been used successfully to examine accommodative function of non-communicative patients. However, there are few studies examining its repeatability and validity. This paper addresses the repeatability and validity of a form of DR (a modified Nott technique), by comparing results to the Shin-Nippon SRW-5000 Autorefractor whose validity and repeatability have previously been demonstrated. Accommodative responses of 41 subjects (aged 6-43 years) were assessed using DR and the Shin-Nippon SRW-5000 Autorefractor. Three different target demands were used (10, 6 and 4 D). DR was shown to be repeatable for all target demands (paired t-test, p > 0.05). The results demonstrated good agreement between the autorefractor and DR. The results of the present study suggest that DR is a repeatable and valid objective technique for assessing accommodative function.

Keywords: accommodative response; dynamic retinoscopy; ocular accommodation; repeatability and validity; Shin-Nippon SRW-5000 Autorefractor

Document Type: Research article

DOI: http://dx.doi.org/10.1046/j.1475-1313.2003.00113.x

Affiliations: 1: School of Biomedical Sciences, University of Ulster, Ulster, UK

Publication date: 2003-05-01