title: The repeatability and validity of dynamic retinoscopy in assessing the accommodative response.
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.
authors.affiliation: School of Biomedical Sciences, University of Ulster, Ulster, UK. j.f.mcclelland@ulster.ac.uk
authors.forename: J F
authors.initials: JF
authors.lastname: McClelland
authors.forename: K J
authors.initials: KJ
authors.lastname: Saunders
mesh_terms: D000065:Accommodation, Ocular; D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D019721:Ophthalmoscopes; D009887:Ophthalmoscopy / Q000379:methods*; D012030:Refractive Errors; D015203:Reproducibility of Results; D012160:Retina / Q000502:physiology*; D012680:Sensitivity and Specificity