My 8 year old son talks about seeing spots (sometimes shapes) of color, usually red or gold at night, just floating around in the room. Says they're neat (though sometimes scary), either hovering a while or just popping in out of no-where and disappearing just as quickly. However, he said that sometimes it's annoying like "the other day when I was taking a test, these gold flecks kept getting in the way, but if I looked really hard, I could see through them." Also says that when he's really excited, he sees greens and purples.
He has a very high IQ and exhibits senistivity to sensory stimulations typical for IQ's at this level.
Question: Could this be an eye, emotional or brain activity issue?