<unk> s 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. In one series, 8 out of 1023 people having an MRI experienced flashing lights.<unk> s have been proposed as an explanation for ball lightning.
Magnetophosphene
Phosphene
Dextropropoxyphene
Acetomepregenol
Theobromine
Oxybutynin
5α-Dihydronorethisterone
Ovandrotone