When I was requested by your secretary to read a paper before this Section it occurred to me that it might be a fitting opportunity to familiarize neurologists with the classification of diseases of the optic nerve as used by ophthalmologists, and to attempt to elucidate, in a measure, the significance of changes in these structures in connection with diseases of the central nervous system. It may seem, perhaps, that such an exposition is unnecessary, in view of all that has been said and written on ophthalmic neurology, but experience has taught that even in this well-traveled path there is still a lack of perfect understanding between ophthalmologists and neurologists.
This has arisen in a large part, perhaps, by reason of the uncertainty which exists at times in the mind of the ophthalmologist when he is requested by the neurologist to render a report on any given case. He is