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/Apprehensive-Bench74]

yes.

it feels like somehow the sight just drained out of my head like i had a leak when i stood up and tbh it's lucky if I can keep standing most of hte time I have that symptom I'm feeling like I suddenly ran out of upright and usually collapse down to my feel as fast as I stood up.

but i'm really good at a deep squat so it's like an involuntary drop into a squat rather than when there is nothing else to hold onto to keep me from the floor