Why do eyes basically turn off when you get up too fast

Question

You know when you get up from a chair and then your vision just turns black,that’s what I mean

In: 0

Answer 1

blood has a harder time to reach your head and thus it can’t do as much.

or in scientific terms:
Orthostatic hypotension — also called postural hypotension — is a form of low blood pressure that happens when standing after sitting or lying down. Orthostatic hypotension can cause dizziness or lightheadedness and possibly fainting. Orthostatic hypotension can be mild.

https://www.mayoclinic.org/diseases-conditions/orthostatic-hypotension/symptoms-causes/syc-20352548#:~:text=Orthostatic%20hypotension%20%E2%80%94%20also%20called%20postural,Orthostatic%20hypotension%20can%20be%20mild