[Normal values of optokinetic nystagmus during mono- and binocular panorama stimulation]

Optokinetic nystagmus was studied in 20 normals (14 females and 6 males) aged from 23 up to 35 with the use of mono- and binocular panorama stimulation (a 1.5-m optokinetic cylinder) with the intensity of 0.67, 1.33 and 2 Hz. In normal subjects, the coefficient of OKN amplitude asymmetry was equal to 6% and the coefficient of slow phase velocity was 7.7%. None of the subjects displayed inversion, i.e. change in nystagmus direction for opposite. Temporal nasal asymmetry in adult subjects was not registered either.