Is there a word for those random spots/patterns you see when you enter your home after playing outside on a sunny day?

I am not sure how many of you have experienced this but coming from a very hot region (South India), I have experienced this numerous times. Especially when I enter my home after spending long duration playing outside on a bright sunny day. I sort of hallucinate(for lack of better word) and see patterns of rings, bubbles and ellipses floating in front of me. I have to either rub my eyes a few times or wash my face to get rid of them!

Is there a specific word/phrase to describe this?

My search revealed psychedelic but I am not sure if that's the word I am looking for.

Having intense, vivid colours or a swirling abstract pattern

[ODO sense 1.2]

More details on the phenomenon I experience:

The patterns that I see are initially very bright because my pupils are still small. As time progresses, the brightness of the vivid patterns starts to fade. I see the patterns with my eyes open. Sometimes I also see them when I rub my eyes. The walls at my home are light, so yes light colored (I haven't been in a room that is dark colored {except for cinema halls, of course}). Not only on walls, I see them on empty spaces right in front of me as well. Yes, they throb and move. They don't change shapes but sizes(expand and contract). The patterns are random. The moment I enter my home, they are everywhere (all over my field of view). Gradually they are at different spots and they fade away. All this lasts for may be 4-5 seconds.

I'm not completely sure what you're describing, but what you're describing might be phosphenes. I'm also reminded somewhat of the aura that is sometimes experienced by people suffering from chronic migraines before an attack begins, although that term is rarely used outside that context.

"Psychedelic" is certainly a good word to describe them, though! Another word that might apply is "kaleidoscopic", comparing the images to what one might see in a kaleidoscope.

There are three optical phenomena that fit your description. (Optical means that what you experience arises from the eye and not from the brain, as would be the case with psychedelic drugs)

• Seeing an afterimage. An afterimage is a persistent image that you see after exposure to bright light that has overstimulated the retina. You can still "see" the afterimage even if you close your eyes.

• Seeing floaters. Floaters are dots and swirls that appear to float across one's field of vision. These are either some cellular debris that have sloughed off the inside of the eyeball or they're discontinuities in the vitreous jelly, the clear substance that fills the eyeball.

• Seeing flashes. This is caused either by the vitreous humor banging against the retina or by a retinal tear or detachment. If these are caused by a blow to the head, we say the victim is "seeing stars."

(Don't rub your eyes. It won't help.)