What is Vestibulo-Ocular Reflex?
The Vestibulo-Ocular Reflex (VOR) is a reflex that stabilizes visual images on the retina during head movement. When the head turns, the eyes automatically move in the opposite direction to maintain a stable view of the world.
Function
- •Enables clear vision during movement
- •Foundation for visual navigation
- •Contributes to the feeling of stability within flow
- •Involves vestibular system, brainstem, and eye muscles
Why does Vestibulo-Ocular Reflex matter?
The vestibulo-ocular reflex matters because it keeps vision clear while the head moves. When you turn your head, it automatically moves the eyes in the opposite direction with very short delay, so the image stays steady on the retina.
Without it, walking or even talking while nodding would make the world appear to jump. The reflex is also adaptable: the cerebellum recalibrates it over time, for instance when someone starts wearing new glasses that change image size.
How is the Vestibulo-Ocular Reflex measured?
The vestibulo-ocular reflex is measured by tracking eye movements while the head is moved. In the bedside head impulse test, a clinician quickly turns the patient's head while they look at a target; a catch-up eye movement suggests the reflex is weak on that side.
The video head impulse test adds a high-speed camera for more objective results. Caloric testing, which uses warm or cool water or air in the ear canal, and rotary chair testing are also used. These tests are performed by trained professionals.
In ONDA Life
Part 2 trains VOR as part of "stabilizing gaze while the head is in motion." This is the foundation for visual navigation and the feeling of stability within the flow — essential for moving through space with confidence.