system
Given the following post, respond as if you're commenting on Reddit:
human
What do blind people see?

Is it pitch black, or dark spot like when you close your eyes or something else?
gpt
The people who are blind from birth do not have a visual sense at all. Hard for us to understand, but that's how it is. They don't see black - they don't SEE anything at all.

People who lose their vision later in life also say that it's an absence of vision rather than blackness.