Nystagmus

Nystagmus is an involuntary, rapid, rhythmic eye movement that can occur in any direction. It is characterized by the eyes making repetitive, uncontrolled movements. It may appear as a side-to-side, up-and-down, or rotary motion. It may be present at birth or develop later in life. Symptoms vary in type and severity, and can be caused by a number of underlying medical conditions. Manifestations may include blurred vision, dizziness, headaches, and difficulty focusing.