Physics:Magnetophosphene
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Short description: Flashes of light seen due to a magnetic field
Magnetophosphenes are flashes of light (phosphenes) that are seen when one is subjected to a changing magnetic field such as when in an MRI. This changing field causes current within the retina or visual cortex resulting in the illusion of light.[1] In one series, 8 out of 1023 people having an MRI experienced flashing lights.[2]
Magnetophosphenes have been proposed as an explanation for ball lightning.[3]
References
- ↑ "ReviseMRI.com : Magnetophosphenes". http://www.revisemri.com/questions/safety/magnetophosphenes.
- ↑ "Biologic effects of 3 Tesla (T) MR imaging comparing traditional 1.5 T and 0.6 T in 1023 consecutive outpatients". J Neuroimaging 17 (3): 241–5. July 2007. doi:10.1111/j.1552-6569.2007.00118.x. PMID 17608910.
- ↑ "Technology Review: Blogs: arXiv blog: Magnetically Induced Hallucinations Explain Ball Lightning, Say Physicists". http://www.technologyreview.com/blog/arxiv/25166/.
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