視運動眼振検査前後の角膜網膜電位の変動について

概要

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Corneo-retinal potentials of normal subjects were investigated before and after optokinetic stimulation, eye tracking and caloric stimulation.<BR>After the optokinetic pattern test, where the maximum angular velocity of the stimulation was 150°/ sec, the corneoretinal potential increased significantly.<BR>This potential also increased after relatively high speed optokinetic stimulation with a constant angular velosity of 45°and 60°/sec.<BR>However, the potential remained unchanged after low speed optokinetic stimulation of 15°and 30°/sec. The eye tracking test and caloric stimulation also produced no change of corneoretinal potentials.<BR>It is speculated that the increase of the corneoretinal potentials after the optokinetic pattern test is caused by the rise in activity of the retinal cells, since high speed optokinetic stimulation affects retinal vision mainly, whereas in low speed optokinetic stimulation or eye tracking affect the foveal vision mainly.