Abstract
The case of a 21 yr old woman with an optic nerve head coloboma and optic pit in 1 eye, a hypoplastic optic nerve head in the 2nd eye, and a small retinochoroidal coloboma in each eye is presented. The probable etiology is some unknown insult involving several ocular embryonic structures and occurring during the 11-mm to 20-mm stage of development. Apparently, optic disc colobomas and optic nerve hypoplasia represent a spectrum of developmental anomalies of the optic nerve.

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