OCULOMOTOR AND NYSTAGMUS TESTS IN SUBJECTS WITH STRABISMUS

Smooth pursuit (SP) and saccades (SC) as well as nystagmus were record ed with electro-oculography in 21 healthy subjects with manifest non-p aralytic strabismus. A normal SP function under binocular conditions c ould be recorded in 67% of the subjects and complementary monocular re cordings increased the figure to 81%. The corresponding figure for the SC test was 38 and 67%, respectively. However, a minority of the subj ects presented a normal test result under both binocular and monocular conditions. Spontaneous nystagmus and/or nystagmus after headshaking was present in 67%. These findings may indicate that subjects with str abismus have a combination of a `subclinical' vestibular and oculomoto r dysfunction.