Optic Disc Enlargement No. 1

Optic Disc Enlargement, thinning (or notching) of neuroretinal rim usually beginning inferiorly and deepening of optic cup. Notching thinning of neuroretinal rim tends to occur, inferiorly, then superiorly, then temporally, and nasal is the last on to be affected. (Courtesy of 2003 Dr. Yan)