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Oscillopsia: visual function during motion in the absence of vestibulo-ocular reflex
A B Morland1, A M Bronstein, K H Ruddock
1The National Hospital for Neurology and Neurosurgery and Physics Department, Imperial College, London, UK.
Journal of Neurology, Neurosurgery, and Psychiatry
|December 17, 1998
Summary
Labyrinthine defective patients with oscillopsia show altered spatial vision during body oscillation, suggesting early visual processing is unaffected by adaptation. Abnormal velocity discrimination may relate to improved oscillopsia symptoms.
Area of Science:
- Neuroscience
- Vision Science
- Vestibular System
Background:
- Loss of vestibular function leads to oscillopsia, a visual disturbance.
- Understanding adaptation mechanisms in labyrinthine defective (LD) patients is crucial.
Purpose of the Study:
- To investigate the impact of vestibular loss on spatiotemporal vision.
- To explore adaptation mechanisms in LD patients experiencing oscillopsia.
Main Methods:
- Assessed visual function and eye movements in normal subjects and LD patients.
- Measured temporal and spatial vision using moving targets and gratings.
- Evaluated velocity discrimination under static and oscillating conditions.
Main Results:
- LD patients and normal subjects had similar temporal vision responses.
- Body oscillation impaired spatial vision in LD patients but not normal subjects.
- Abnormal velocity discrimination was observed in some LD patients.
Conclusions:
- Spatial response function changes are linked to retinal slip during motion.
- Visual adaptation in LD patients does not alter early visual processing spatial functions.
- Abnormal velocity discrimination might correlate with oscillopsia improvement.