My Daughter had them with headaches when she was younger but they gradually went away.
I get them in early spring and late fall when the sun is at the perfect angle to produce glare on automobiles.
I only get them once or twice a year; there’s always a very tiny feeling of headache that only lasts a few minutes, but the jagged lightning-bolt thingies on the periphery of vision last about 20 minutes. Almost always set off by seeing some kind of flashy-light business.