Measurement of eye deviation under the nonfixative condition in patients with peripheral labyrinthine disorders, especially Meniere's disease.

Among 232 Japanese patients with peripheral disorders, 98 had a unilateral Meniere's disease. In these patients and 20 healthy adults, recordings of eye deviation were made utilizing DC-ENG under two conditions, i.e. eyes closed (EC) and eyes open in the absolute darkness (AD). (1) 90 % tolerance interval of AD. was significantly smaller than that of EC in controls. (2) Appearance of nystagmus in 5 groups with labyrinthine lesions was compared with the direction of deviation toward and against the affected side in both conditions. (3) Concerning unilateral Meniere's, the relationship among deviation, nystagmus and caloric response was analyzed statistically and the clinical application discussed.