Saccadic eye movement parameters in normal subjects.

The present study obtained saccadic eye movements from 122 normal subjects to establish normative values and test-retest reliability data, using a recently developed electrooculographic recording and analysis system. Factors that might affect saccade values, such as age, sex, and time of day when testing, were also assessed. Mean (+/- S.D.) peak velocity values over saccade angles of 15 degrees, 25 degrees and 35 degrees were in agreement with those previously reported. Repeat testing in 11 subjects on 4 separate occasions showed that saccade measurements were consistent across tests. Several saccade parameters were significantly negatively associated with age for 35 degrees saccades. The association between age and peak velocity was examined in greater detail over a range of saccade angles, and the greatest effect was observed for saccades of > or = to 35 degrees. Diurnal changes in performance were observed, with a tendency for slightly slower values in the early afternoon. There were no significant differences between males and females.