Intermediate
Technical
IVT
versional eye movement
Conjugate eye movements where both eyes move in the same direction.
Full Definition
A class of binocular eye movements in which both eyes rotate in the same direction, either horizontally or vertically. Includes saccades, smooth pursuit, and optokinetic movements. Controlled by brainstem nuclei and differs from vergence movements where eyes move in opposite directions. Essential for maintaining fixation during head movements and tracking visual targets. Editors should distinguish from vergence movements in clinical documentation.
Usage
Usage note: Use singular 'movement' when referring to the category, plural 'movements' for multiple instances.
In Context
- "Versional eye movements were intact bilaterally with normal saccadic velocities." — Neuro-ophthalmology examination
- "The patient showed impaired horizontal versional movements suggestive of a pontine lesion." — Clinical assessment report
Also known as
conjugate eye movement
version
Contrasted with
vergence movement
disjunctive movement
Don't confuse with
vergence
vestibular eye movement