[Quantitative analysis of oculomotor functions in various age groups of normal subjects]

The oculomotor functions were studied in 50 normal subjects aged 20 to 60 years. The experiments consisted of saccadic test, smooth pursuit eye movement and optokinetic nystagmus. The normal values and sensitive indicators of ageing were obtained. With increase in age, the latency of saccade was prolonged (P < 0.05) and its accuracy showed a tendency to decrease. There was no relationship between the velocity gain of eye movement and age during two amplitudes and velocities of smooth pursuit test, but its total harmonic distortion was increasing with ageing. With increase in optokinetic velocities from 10 degrees/s to 40 degrees/s the velocity gain of eye movement decreased in all groups, but its values in > 40 year-groups decreased more than < 40 year groups. During high velocity optokinetic stimulation, the gain was more obviously decreased in elder age group.