Eye has the most important function of visualizing the surroundings. Eye acts as a biological camera, but the print remains in the occipital lobe of the brain in association with temporal cortex. To get a glimpse of the surrounding, you need to move the eye voluntarily and also involuntarily through reflex means. The movement of eye is part of the motor system abnormality, but surprisingly, in some motor system disorder eye movement remains untouched, such as Motor neuron disease. Movement disorders are a unique group of disorders that in most of the cases, the eye movements get affected and a clinician gets a valuable clue for diagnosis. Eye movement is a heterogeneous group and different neural substrates are differentially involved in various conditions. The purpose of this article to provide the readers about the physiology of eye–movements and describe the disturbances in different movement disorders, particularly parkinsonian disorders. The author has presented the information systematically.