Additional Study Information: Baseline Eye Movement Recruitment. This study is looking to recruit normal adult subjects for their base line eye movements to build a control database. This database will be helpful for physicians to diagnose disorders of eye movements that are common in neurological and ophthalmological disease such as: Parkinson's, Progressive Supranuclear Palsy, Stroke, Multiple Sclerosis, Myasthenia Gravis, Mitochondrial Muscle Diseases, Grave's Eye Disease, and others.