The relationship between dynamic visual acuity and saccadic eye movement

Abstract

　The purpose of this study was to clarify the relationship between dynamic visual acuity and saccadic eye movement. Twenty-seven young adults, mean age 21.3±2.4 years, participated in this research. Electrooculography (EOG) was employed for analysis of the saccadic eye movement. Saccadic eye movements were recorded during measurements of dynamic visual acuity. Peak velocity, angle, and latency of saccadic eye movement were measured employing EOG. As a result, there were no relationships between dynamic visual acuity and peak velocity and angle of saccadic eye movement. However, there was significant correlation between dynamic visual acuity and latency of saccadic eye movement (at target velocity 49.5 rpm: r=-.734, p=.000, 47.6 rpm: r=-.619, p=.001, 45.1 rpm: r=-.538, p=.004, 42.5 rpm: r=-.600, p=.001, 40.0 rpm: r=-.478, p=.012). It was suggested that early start of saccadic eye movement is one of the important factors in the accurate discrimination of a moving target at high speed.