[Neuro-otological studies on the correlation between vision and oculomotor function tests].

Abstract

The vision of 35 subjects with normal oculomotor function was artificially reduced with the use of convex and concave lenses and neutral density filters. The effects of blurred vision on the oculomotor function test were subsequently studied. In using neutral density filters, abnormal findings tended to be confirmed in the eye tracking test (ETT) and optokinetic nystagmus test (OKNT) for vision of 0.5 or less. However, the ratio of abnormal findings to the ETT markedly decreased as the intensity of the target luminance increased. Blurred vision due to refractive abnormality using lenses, had hardly any effect was detected on either test even in the cases of severe blurred vision. In conclusion, the effects on the oculomotor function test varied according to causes of blurred vision.