Memfis

I've been thinking. I feel like I haven't encountered a single blind person in years. I'm not sure if I ever seen someone probing the surroundings with a long stick, using these yellow things for navigation, or reading a braille book on a bus, in the park, etc. I understand if most of the time they sit at home, but they still should appear sometimes? Do I just not realize that there are blind people around me? Do they typically try to hide their blindness because they don't want to look weak or vulnerable to pickpocketing? Did they all leave Russia since it's probably a horrible place to live in if you're disabled? Do they even exist?