EFFECT OF PUPIL SIZE ON DYNAMIC VISUAL ACUITY1

    loading  Checking for direct PDF access through Ovid

Abstract

This study was conducted to assess the effect of pupil size on dynamic visual acuity (DVA). 60 young healthy men (M = 28.1 yr., SD = 3.9) with normal vision were divided into three age-matched groups by pupil size: dilated (n=20), unchanged (n = 20), and constricted (n = 20). DVA was measured binocularly with free-head viewing before and at 30 min. after each drop was instilled. Each of the three groups got a different amount. The sizes of the constricted, unchanged, and dilated pupils were 2.8 mm (SD=0.5), 4.1 mm (SD=0.3), and 7.8 mm (SD = 0.5), respectively. The pupil size × DVA interaction was significant (F2,114 = 6.07). DVA in the constricted pupil decreased, but that in the dilated pupil increased (paired t test). DVA in the unchanged pupil did not change significantly (paired t test). Pupil size is possibly one of the factors which may affect DVA measurement.

Related Topics

    loading  Loading Related Articles