Also, attaining to your upside-down-light thing, reality is not upside down lol.
I think it has to do with your concave / convex (dont remember which is which lol) that flips it. Its not like everything is upside down and we see it wrong lol. If you wore goggles that flipped everything upside down and wore them for 24 hours, everything would seem normal. but if you took them off then everything would be upside again lol. It has to do with your brain, not the light