| coloboma of optic nerve | <anatomy, nerve> A congenital notch in the formation of the optic nerve, appearing as a craterlike excavation at the optic disk. (05 Mar 2000) |
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| coloboma of vitreous | A congenital indentation of the vitreous body by mesoderm; associated with severe myopia. (05 Mar 2000) |
| coloboma palpebrale | A congenital notch in the eyelid margin. (05 Mar 2000) |
| Fuchs' coloboma | A congenital inferior crescent on the choroid at the edge of the optic disk; not associated with myopia. Synonym: congenital conus. (05 Mar 2000) |