Aplasia of the optic nerve: report of three cases.

Aplasia of the optic nerve is a very rare congenital anomaly characterized by an absence of optic nerve fibers, retinal ganglion cells, and the retinal central blood vessels. It may be associated with a wide range of other congenital abnormalities. In the present article, three cases of aplasia of the optic nerve are described. Its pathology and clinical features are reviewed.