"Cherenkov radiation can be generated in the eye by charged particles hitting the vitreous humour, giving the impression of flashes"
http://en.m.wikipedia.org/wiki/Cherenkov_radiation#Character...
"Cherenkov radiation can be generated in the eye by charged particles hitting the vitreous humour, giving the impression of flashes"
http://en.m.wikipedia.org/wiki/Cherenkov_radiation#Character...