Abstract
Subjective light patterns (phosphenes) can be produced by electrical stimulation of the temples with rectangular current pulses of about 0.1 to 1 mA RMS within the electroencephalographic frequency range (1 to 70 c/s). The phosphenes either consist of formless flickering of the visual field or of different abstract geometrical figures on a dark background. Electrical excitation of phosphenes in Munich (altitude 530 m) and in the mountains at 2962 m showed the tendency that more phosphenes can be elicited at high altitude. There was no difference between the types of phosphenes obtained at the two altitude levels.
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Eichmeier, J., Niedermaier, S. Excitation of subjective light patterns (phosphenes) at different altitudes. Int J Biometeorol 20, 304–308 (1976). https://doi.org/10.1007/BF01553587
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DOI: https://doi.org/10.1007/BF01553587