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EMF Study
(Database last updated on Oct 14, 2021)

ID Number 1409
Study Type Human / Provocation
Model ELF (10-50 Hz) to humans and frog retina and analysis of induced magnetophosphenes (perception of visual light)
Details

Human subjects were exposed to 10-50 Hz ELF at 0-40 mT (of the type used for heating in welding and steel industries) to induce magnetophosphenes (visual light phenomena in the eyes). The authors report typical threshold values as a function of frequency at 20-25 Hz, with differences between volunteers in detection of color. In related studies, frog retina were also exposed to these fields and retinal activity measured from the ganglion cell layer using microelectrodes. The authors conclude that magnetophosphenes are generated in the retina and in the same channels normally propagating signals induced by light.

Findings Effects
Status Completed With Publication
Principal Investigator Linkoping University, Linkoping, Sweden
Funding Agency Research Council, Sweden
Country SWEDEN
References
  • Lovsund, P et al. Med Biol Eng Comput, (1981) 19:679-685
  • Lovsund, P et al. Med Biol Eng Comput, (1980) 18:758-764
  • Lovsund, P et al. Radio Sci., (1979) 14:199-200
  • Lovsund, P et al. Acta Ophthalmol (Copenh), (1979) 57:812-821
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