Speaking as a legally blind person.

First take everything you see in books, movies, and everything you think blind is and flush it down the toilet.

Second blind is white not black. Virtually no blind person sees a sea of black including congenitally blind people. Even a person with no eyes sees a color, it is called mind gray.

Third most blind people can see something.

Blind is defined as less than 600 vision in the good eye. (20-200 where at 20 feet they can’t see writing a sighted person can see at 200 feet.)

Or less than 20-degree field of vision in the good eye, however inside that 20 degrees a blind person can have 20-20 vision with corrective lenses. (Think of it as looking at the world through a paper tube.)

This of course does not include what your brain does with what your eyes see.

In short, no two blind people are the same, so there is no one cure-all.