Analysis of optokinetic and eye tracking data on normal subjects.

This study was undertaken to determine the incidence of abnormal eye tracking patterns in normal subjects and to compare the optokinetic (OPK) response of normal subjects using a nystagmographic gonioscope (Nystagmotrac) and Coats's type of OPK drum. Eye movement was recorded by means of an electronystagmographic (ENG) recorder, and the speed of the slow component was computed for the OPK response. The eye tracking test showed a high rate of abnormality among our subjects. Optokinetic testing revealed highly symmetrical responses for all subjects.