7.ROTATIONAL TESTS
7.ROTATIONAL TESTS
The patient is placed on a chair that rotates at a constant speed after an initial acceleration, and the eye movements are measured during and after rotation. This tests the functioning of both inner ears.
The chair rotates horizontally for one minute. For 4 seconds it accelerates from 0 to 80°/sec then rotates at a constant speed for 60 seconds before decelerating over 4 seconds from 80°/sec to 0°/sec. This test measures the time constant of the vestibulo-ocular reflex and detects in particular any asymmetry between the semicircular canals of the inner ears.
This examination is very well tolerated and non-invasive.
Preparation
Do not wear mascara or eye-liner since these interfere with pupil tracking.