Not crippled . Use the same courtesy rules about asking personal questions that you would apply to a non-disabled person. You need not accept rude or inconsiderate behavior from a disabled person. Don't exclaim over a disabled person's ability to do what are often actually pretty simple tasks for them. A person s other senses become more acute after onset of blindness.
Braille is the most widely used communication method for blind people.
You need to speak louder to a blind person. Blind people are very musically gifted. A blind person will want to touch you more than a sighted person will or will want to feel your face. Not sightless . Instructions for Sighted Guide.