I am Registered Blind.
When it happened, the categories were "Partially Sighted" or "Registered Blind".
I didn't understand all this at the time, because I had had no previous experience with Visual Impairment and it all happened very quickly. I argued with the consultant because he recommended I be Registered Blind, and my arguement was "But, I can still see SOMETHING".
He told me that It is very rare that a Blind/Registered Blind/Severely Impaired person has no useable sight whatsoever.
At the moment, the "Official" phrases are "Sight Impaired/Visually Impaired" (which is what used to be "Partially Sighted"), and Severely Visually Impaired/Severely Sight Impaired" (which is what used to be "Registered Blind/Blind").
To be honest, I don't like any of those, I just prefer to say "My eyes are buggered".
The amount of times I've had people accuse me of faking my Blindness because I'm doing something that they, a Sighted person, have decided that a Blind Person should not be able to do, is staggering.
People often assume that Blind means Complete Darkness.
It doesn't.
But, it still doesn't change the fact that Kipper is an insufferable cockwomble thundercnt of the highest order.