ocular dysmetria ocular dysmetria ocular dysmetria is a form of dysmetria that involves the constant under- or over-shooting of the eyes when attempting to focus gaze on something. ocular dysmetriaspecialtyophthalmology differential diagnosislesion in cerebellum ocular dysmetria indicates lesions in the cerebellum, which is the brain region responsible for coordinating movement. it is a symptom of several neurological conditions including multiple sclerosis. it is a condition that can cause symptoms similar to sea sickness.