<unk>  (OMA), is the absence or defect of controlled, voluntary, and purposeful eye movement. It was first described in 1952 by the American ophthalmologist David Glendenning Cogan. People with this condition have difficulty moving their eyes horizontally and moving them quickly. The main difficulty is in saccade initiation, but there is also impaired cancellation of the vestibulo-ocular reflex. Patients have to turn their head in order to compensate for the lack of eye movement initiation in order to follow an object or see objects in their peripheral vision, but they often exceed their target. There is controversy regarding whether OMA should be considered an<unk> , since<unk>  is the inability to perform a learned or skilled motor action to command, and saccade initiation is neither a learned nor a skilled action.
Oculomotor apraxia
Dysmorphopsia
Ophthalmoparesis
Pelopsia
Visual agnosia
Agraphesthesia
Finger agnosia
Xanthopsia