Dynamic visual acuity (DVA) is the ability to recognize a moving target on a horizontal plane. Since pupil dilation may affect driving performance, this study seeks to assess DVA under pupil dilation. A total of 30 healthy young adults with pupil dilation participated in this study as the Mydrin P group. Fifteen additional healthy young adults without pupil dilation were enrolled as the control group. DVA was measured binocularly with free-head viewing at 0, 30, 60, 120, and 360 min after mydriatic drop instillation in both eyes. Pupil size was measured at each time. Results showed that in the Mydrin P group, DVA significantly improved at 30, 60, and 120 min but returned to the pre-dilation level at 360 min. Pupil size changed from 4.1 to 7.8 mm at 30 min after the instillation, and this level was maintained up to 120 min but returned to normal within 360 min. In the control group, DVA did not significantly change at all measured times. This study suggests that the pupil size is one factor that may affect DVA. The finding that DVA significantly improved under pupil dilation may have implications for tasks in which dynamic vision is critical, such as driving.
Samenvatting