A Case of Atypical Coloboma Associated with Abnormal Retinal Vessels.

IN a paper on" Certain abnormal conditions of the macular region usually classed as colobomata," which appeared in this journal in *March, 1927, an attempt was made to classify congenital defects in the neighbourhood of the posterior pole and to provide some diagnostic points by means of which a rough idea of the time of origin and the mechanism of production of the abnormality might be gained. The anomalies were grouped into three classes (intermediate types also being known to occur), namely,