Unfortunately, people who are born blind or become blind young and later regain vision are still unable to see in a way that improves on blindness. Their visual cortex never develops properly and is co-opted by the brain for other things. Oliver Sacks wrote an essay in one of his books about patients with congenital cataracts who got a newly developed surgery as adults and never developed useful vision.
Unfortunately, people who are born blind or become blind young and later regain vision are still unable to see in a way that improves on blindness. Their visual cortex never develops properly and is co-opted by the brain for other things. Oliver Sacks wrote an essay in one of his books about patients with congenital cataracts who got a newly developed surgery as adults and never developed useful vision.