|
Last updated 6/2002 The vestibuloocular reflex (VOR) test is most helpful for diagnosing ototoxicity and other bilateral vestibulopathies. The dynamic illegible ‘E’ (DIE) test is a very helpful procedure (Longridge, 1987). The physician has a patient view an eye chart with the head still and records visual acuity. Then the physician moves the patient’s head slowly (about 2 Hz), 30 degrees to either side, and again records visual acuity. Normal patients have no loss in visual acuity with this procedure. Patients with bilateral loss, especially acutely, often lose six to eight lines of visual acuity. As patients recover from bilateral loss, they perform better on this test. This is probably related to a combination of adaptive changes in the vestibuloocular reflex, as well as predictive preprogramming of eye movements (Herdman et al, 2001). References
|
