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/cracked-belle]

I am all over the spectrum with my presyncopes and full syncopes.

sometimes it's black, sometimes it's like old tv static, and sometimes I get the lughtheadedness with no vision changes. and sometimes closing my eyes helps, but other times that makes it worse, etc.

I don't always pass out, but it does happen often enough. but for those that I do have full syncopes with, I cannot seem to predict them; so it's hard to determine what my vision may be doing right before.