congenital nystagmus

n.

A congenitally predetermined nystagmus caused by lesions sustained in utero or at the time of birth.
An inherited, nonprogressive, usually sex-linked nystagmus without associated neurologic lesions.
The nystagmus associated with albinism, achromatopsia, and hypoplasia of the macula.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.