Congenital anomalies of the optic disk.

Six patients had congenital anomalies of the optic disk: epipapillary fibrous tissue, peripapillary pigmentary disturbance, and anomalies in the size of the optic disk and in the retinal vessels. Congenital anomalies of the optic disk form a spectrum in which many of the ophthalmoscopic features are shared and in which visual function varies.