The effects of post-rotational nystagmus on vision

Eight pilots and eight non-pilots were rotated in a Barany chair at 30 revolutions per minute and 45 revolutions per minute for 60 and 120 seconds. The subjects were required to track a target on a computer screen after the rotation to determine the amount of time for their vision to clear. The dependent variable was the amount of time to attempt to hit the target the first time or the mean time for each of the first five attempts. There were no significant differences between conditions, however, there were some weak interactions between groups and conditions (p<.10). The literature suggests there would be no difference due to the rotational speed. The lack of significant differences can also be attributed to experimental error, and lack of sensitivity of the tracking task. Pilots tended to have faster speeds, indicating they may have habituated to the stimulus because of their flying. Further research with differing age groups and differing experience levels is indicated.