conjugate nystagmus

con·ju·gate nys·tag·mus

a nystagmus in which the two eyes move simultaneously in the same direction.

con·ju·gate ny·stag·mus

(kon'jŭ-găt nis-tag'mŭs)
A nystagmus in which the two eyes move simultaneously in the same direction.
References in periodicals archive ?
Typically, IN is a horizontal conjugate nystagmus, although, rarely, it can be vertical or asymmetric (more pronounced in one eye).