For me it turned out to be sudden blood pressure drops. I'd see my vision fade to yellow from the outside in. At 12 I had every damned test done by an ophthal

For me it turned out to be sudden blood pressure drops. I'd see my vision fade to yellow from the outside in. At 12 I had every damned test done by an ophthalmologist, only to come up empty. Much later, I had blood drawn for a test and when I stood after the same thing happened, but worse, and from everyone else's pov I fainted (I could hear and think, but not see or move). That's when I realized the issue was sudden blood pressure drops. Sometimes this was accompanied by sugar lows, sometimes not. Mind you, I never saw anything like the picture we're discussing here.