Even if they were blind all their lives, the brain has to have specific functionings in order to process sight. This includes, a reaction in parts of the brain to the sight of hard edges facing any direction.
The observational reaction of these edges is wired into the brain from birth, so even if they would not be as developed in a person who was blind, they would still have them.
And if they didn't have this brain functioning, then they would not be able to properly process sight. And so would not have techinically regained sight yet.
Yes because the brain produces a visual image using touch, blind people might not be able to receive visual stimulus but that doesn't mean they can't use the part of the brain involved with mapping out objects and imagining its shape.
Depends. In actual cases where blind people have regained their sight- in causing those who lost sight as babies or children and regained it many decades later- some objects they recognize when they see them based on having touched them- others they do not. Objects you CAN’T touch like drawings or photos or even words can be hard for some formerly blind to grasp- looking not like anything at all but colors or lines- without certain mechanisms of visual context and association they are unable to process what the thing they are looking at is supposed to represent- since it isn’t an actual representation but a stand in that is essentially an optical illusion made to make a brain think it is seeing something.
One man who regained his sight couldn’t recognize the faces of his wife or children- another man could recognize certain objects he had touched but not others. Being blind and regaining sight isn’t like opening your eyes of turning on a light. In sighted people when we touch something- the parts of the brain that process visual stimuli light up- as though part of the process of feeling for sighted people is linked to sight. In the non sighted those parts aren’t used when touching.
The observational reaction of these edges is wired into the brain from birth, so even if they would not be as developed in a person who was blind, they would still have them.