When one of the senses are compromised, very often the other senses will have notably heightened acuity.
I have little doubt this blind gentleman you speak of can taste the ball gag in his mouth better, can hear the Sturmtruppen marching from miles away, is overwhelmed by the stench of feces and decay in this nation, and can feel every splinter of the wooden spindle being shoved up his ass much, much better than everyone else.