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 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.
Source of information: Mult-sclerosis.org
References
Ocular dysmetria Wikipedia(Text) CC BY-SA