Wearing a blindfold with your eyes closed for an extended period of time would produce the same sensation as putting your eyes out, no matter what you're dealing with a loss of sensory information that you once had it's just that one is a permanent loss and the other is only as long as you desire.
Being Blind-born is a completely different thing than blindness acquired over a lifetime, blind-born individuals don't see/have visual stimuli in their dreams as that part of their brain was obviously never developed whereas people who go blind over the course of their lifetime will still be able to see in their dreams.
Also blind people can still use touch to conceptualize the shape of objects, unlike deafness which has no supplementary sense leading to bigger problems.
I also have Graces F pre-ordered but I don't know any of the characters.