It is my intention to limit this discussion to those eye disorders having problems which require diagnostic screening or treatment by a neurosurgeon. The ophthalmologist admittedly is the clearing agent for the general recognition of a large group of eye abnormalities which he is especially trained to detect. However, he often reaches a point in diagnosis or therapy where his common knowledge and experience makes it obvious that he should seek the help of some other specialist who can supplement his efforts. With the advance in mechanical sciences there has been rapid progress in the development of mechanical diagnostic methods for the precise recognition of deep lying, formerly poorly understood, intricate gross lesions of the cranial cavity which cripple the ocular machinery. By the injection of air into the fluid-bearing spaces of the spine and skull and contrast media, thorium dioxide (Thorotrast) and iodopyracet (Diodrast), into the cerebral vessels we