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