I've asked myself the same very question.... I came up with an idea, if a blind person took acid or shrooms etc.... Their senses would go haywire, imagine. They can't see, so their hearing is what they depend on, it would probably then "tweak" their hearing capabilities.... But, I still can't say if they would see anything.... I don't know? If a deaf person took a hallucinogenic drug, imagine what kind of trip they would be in for.... Pretty interesting.....