Intra-ocular Tumours.

IN practice, intra-ocular tumours are vaguely classified as gliomata if they originate in the retina, or as melanomata if they have originated in the choroid and contain brown pigment that does not give the iron reaction. Those attempting greater precision place most of the gliomata in the more restricted group of retinoblastomata. The problem, however, is not so simple, for on closer examination a more detailed grouping becomes necessary. Tumours occurring in other parts .of the body have been classified with varying degrees of success, according to the development of the tissue of the part. Similarly, the classification of intra-ocular tumours can be based on retinal and choroidal development.' In the present paper a series of 60 intra-ocular tumours is reviewed and a classification is attempted on adevelopmental basis.