People find it impossible not to stare at someone who looks different from what they normally expect. P. T. Barnum made a lot of money by exploiting this normal human tendency. Initially, I used to be disconcerted by the stares but now I am quite blasé about them.
When people see me for the first time, they are not sure how to interact with me. Perhaps they had thoughts similar to that of Bertie Wooster when he escaped from some disaster. ("There, but for the grace of god, goes Bertram.") Old people will stand some distance away from my bed and stare silently at me. Many of them would have dandled me when I was a child and would not have expected a situation like this.
In "Last Chance to See", Douglas Adams describes the aye-aye of Madagasar :
The aye-aye is a nocturnal lemur. It is a very strange-looking creature that seems to have been assembled from bits of other animals. It looks a little like a large cat with a bat's ears, a beaver's teeth, a tail like a large ostrich feather, a middle finger like a long dead twig and enormous eyes that seem to peer past you into a totally different world which exists just over your left shoulder.
Some people adopted the aye-aye strategy when they met me and carried on a conversation with someone behind me. Looking directly at me will mean asking me some questions for which they will not understand my reply. So how do you look at me without looking at me? Imitate the aye-aye!
You don't exactly become an unperson when you can't move or speak but you tend to become part of the décor while conversion flows about you. At first I used to feel uncomfortable but nowadays I prefer to be ignored because I won't have the hassle of having to think of how to respond without being misinterpreted.
Sometimes people will come into my room and stare silently at me without speaking to me or to anybody else. I will wish someone will say something but I will only be met with silence of the sort which I have seen being described as deafening.