Love it! It seems like all symptoms are weird until you put them altogether
I have ON and get the sparkles all the time, with blurry eye, a free high I guess. Sparkles and halos around light can also be glaucoma. If your vision is clear, no eye pain, just sparkles, at least call eye dr to check eye pressure for glaucoma (I am tested 2x's yr cause my eye pressures are up a bit)
I also get sparkly crescents (think a migraine is coming, but no, just sparklies)
I don't really know what it is either. I'd check with eye dr just to rule out glaucoma and take it from there.