septo-optic dysplasia

[sĕp′tō-ŏptĭk]
n.
  1. A congenital hypoplasia of the optic nerve resulting from the defective development of the retinal ganglia cells and their axons.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.