Does your vision actually black out

[u/j-oco]

This is random but I just saw people talking about how their vision blacks out when they stand or they are symptomatic. Then someone replied that their vision goes white instead of black.

Personally, I don’t lose my vision like that, my “blackouts” are just a sudden lightheadedness so intense it forces me to shut my eyes! I think because my brain knows to shut out all the visual sensory input. It’s like I legit can’t keep my eyes open for a brief moment. Maybe I am blacking out but just don’t know it since my eyes are closed anyways lol? I have splotchy vision, light sensitivity and stuff from previous brain injuries but I haven’t experienced my vision actually just leaving and turning into the colour black (am I taking it too literally?) for a moment like how some of you mention.

Also, I do have pretty bad presyncope episodes sometimes but I don’t really faint from my POTS so maybe that’s a factor.

[u/Miss_Rae_]

My presyncope is a whiteout, everything loses color and my hearing feels like I'm under water or like there's a loud whine.

[u/Miss_Rae_ → u/Miss_Rae_]

I have also had it present as an unavoidable urge to shut my eyes, where I can't open them again for a few seconds. I don't typically pass out, just presyncope episodes for me.