This subspecialty of ophthalmology deals with the diseases of afferent visual pathway like demyelination, ischemic, nutritional, toxic, infiltratative, hereditary, compressive optic neoropathy, chiasmopathy and retrochiasmal disorders of central visual pathways, Efferent pathways disorders of ocular motility like Nystagmus, Saccadic-Pursuit Disorders, Palsies of nerves of ocular motility of various etiologies, Ocular Myasthenia. So this subspecialty deals with diagnosis of various types of diplopias and visual loss and managing them in conjuction of Radiologist, Neurophysician and Neuro-Surgeon.