title: Accommodative response during distance optometric test procedures.
abstract: The control of accommodation is an essential requirement during the clinical optometric assessment of distance vision. Accordingly, the aim of the present study was to examine the steady-state accommodative response during a number of conventional clinical procedures carried out at a viewing distance of 6m (20 feet). Accommodation was measured subjectively to Snellen letters using a Hartinger coincidence optometer during distance viewing, simulated retinoscopy and following the introduction of cylindrical and prismatic lenses in 13 visually-normal, young adults. No significant change in the mean accommodative response was induced by any of the techniques described, with subjects exhibiting a lead of accommodation of approximately 0.25D for all conditions. The results demonstrate the robustness of accommodation to apparently substantial changes in stimulus conditions.
authors.affiliation: Department of Vision Sciences, SUNY/State College of Optometry, NY 10010.
authors.forename: M
authors.initials: M
authors.lastname: Rosenfield
authors.forename: K J
authors.initials: KJ
authors.lastname: Ciuffreda
authors.forename: J
authors.initials: J
authors.lastname: Rosen
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000328:Adult; D004215:Distance Perception / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009907:Optometry / Q000295:instrumentation; D014787:Vision Tests