To examine whether there are differences in neurophysiological responses to light stimulation of different frequencies and modulation depth between hypersensitive persons and healthy subjects.
Ten patients with neurological and skin problems that they claimed to result from visual display terminal (VDT), fluorescent light, or television exposure were included in the study. Ten subjects without any problems associated with VDT work or light exposure served as the control group. The participants were exposed to flash stimulation at frequencies of 20, 25, 35, 45, 55, 65, and 75 flashes per second. The depth of modulation was investigated at 100, 75, and 50 % modulation at 45 Hz.
No exposure details are available.
A statistically significant difference in the visual evoked potential amplitudes between the patient and control groups was observed. No differences were revealed in the retinal responses.
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