Keep in mind that a character is more than someone with vision loss. He's his own person, who happens to have vision loss. I often see characters who are almost completely centered around their vision loss, and know nothing else about then. What do they like to read? What do they like to drink? What are their aspirations and goals?

Perhaps they have a focus on their vision loss (maybe they want revenge on someone the person who blinded them or something). But what are they doing about that? Just sitting and thinking? Working out like a maniac and shooting up steroids? etc.

When someone loses their vision, they don't automatically get better hearing, as people assume. What happens is people learn to use their hearing better. But that takes time and practice, it isn't instantaneous. Over time, though people can hear how sounds echo off walls and identify hallways, doorways and sometimes smaller objects like poles. Same with feeling, it takes time to build up the sense of touch (For example, the 5 Braille textbooks that my organization uses, the first book doesn't even have Braille. It's all pre-Braille stuff, learning to follow lines and identify shapes).