The purposeful or piercing way Piper "looks" at you sometimes, it's hard to believe that he actually doesn't have the faculty of sight. His facial expression clearly shows awareness and attention. Of course, his reaction to the movement and sound coming from a certain direction may well reflect that he is using his sense of hearing. But I am sure that he actually "sees", not with eyes, which he doesn't have, but with his heart.
It is certainly a handicap to have lost one's sight, but if, like Piper, one remains positive and sharpens his other sensory perceptions, and if, like Piper, one lives in a supportive environment, he may still lead a full and confident life.
It is also important to remember how lucky we are to be healthy. How stupid it is if we abuse the senses that we are endowed with.