ABSTRACT
We have previously found differences in the amount of visual discomfort reported over the menstrual cycle when women wore a head-mounted display (HMD) to view a nauseogenic virtual reality (VR) computer game (Clemes and Howarth, 2001). A greater change in visual discomfort whilst playing the game was reported during the second week of the menstrual cycle, which mirrored the changes in nausea symptoms associated with the use of this equipment. Such variations are also consistent with other changes in sensitivity, such as hearing thresholds (Elkind-Hirsch et al., 1992), which occur over the cycle.
