Like, is it just total darkness or, the opposite? Is it easier for them to fall asleep given that there’s no light to distract them whilst trying to nod off?
I feel like an absolute ass for asking these questions, and I’m honestly not trying to hurt anyone’s feelings or anything.
Yes, official it is called Blind defined as a vision that is less than 20/40. Technical it called visual impairment, and it is a spectrum. Some people vision are blurry or they can see very small parts or they have floaters. When these or absolute loss of vision become less than 20/40 then the person is considered legally blind.
So now what they can see, if they can see, depends on the type and how bad the condition is.