The Pendular Eye Tracking Test under Two Background Viewing Conditions.
NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL
Pagination or Media Count:
Visual pursuit tracking of a sinusoidally moving target is a useful diagnostic aid in individuals with presenting symptoms of vertigo and disequilibrium. This test is conducted under various conditions that may influence both the variability of response among normal subjects and the pathognomic significance of the test. Normative data were collected from 60 subjects under two conditions of viewing a moving target, with and without a visible background. Smooth pursuit tracking of a target moving sinusoidally at 0.5 Hz with peak velocities ranging from 60 degsec to 30 degsec was slightly but fairly consistently superior under the former condition, i.e., with a visible background of vertical black and white stripes. It is suggested that the peripheral retina aids in visual pursuit tracking and that the test should be conducted under both viewing conditions since partially different systems are sampled by the two procedures. Author
- Anatomy and Physiology