My Wife has got epilepsy & was always affected (she'd get a headache & had to limit her viewing) by the 50hz flicker on CRT TV's in England, France, Spain & Malta. When we went to America (60hz flicker) she was hardly affected at all, she could watch a TV film all the way through with no ill effects. So what did she watch the most ? Eastenders that she'd already seen on WPBT (PBS) channel 2 Miami. Girls. (sigh)
We've now got an LCD TV that doesn't flicker at all, had it 6 years. Went to a friends house the other day & they'd got an old CRT TV connected to a digital converter box & boy did it flicker, I found it really annoying, but years ago it never bothered me at all, I think my brains flicker filter has stopped working through non use..