Horizontal pendular nystagmus

What it means

Nystagmus consisting of horizontal to-and-fro eye movements of equal velocity.

Pendular nystagmus refers to the situation in which the eye appeared to oscillate with equal speed in either direction, in contrast to jerk nystagmus, in which the movement in one direction is faster than in the other.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category