The effect of roll-tilt on ocular skew deviation.
Static roll-tilt of normal healthy subjects causes the ocular tilt reaction (OTR) one component of which is disconjugate vertical eye position (skew deviation). In this study the magnitude of skew was measured subjectively by the use of a computerized Hess test at three static roll-tilt angles (head erect, left ear down and right ear down) and two viewing distances (20 cm and 60 cm). The results showed that during static roll-tilt there was a small skew deviation, the magnitude of which was increased at close viewing distances.
Betts
G A
GA
Department of Psychology, University of Sydney, NSW, Australia.
Curthoys
I S
IS
Todd
M J
MJ
D000344:Afferent Pathways / Q000502:physiology; D003290:Convergence, Ocular / Q000502:physiology; D005133:Eye Movements / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D009949:Orientation / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology; D012016:Reference Values; D014724:Vestibular Function Tests; D014725:Vestibular Nerve / Q000502:physiology