Yup, you sure did, also you read brialle using your fingers so, no they cannot see it, but they can read it, saying that they can see would be stretching it a bit too much.
I thought that the joke was that there was a computer advertisement that blinds obviously wouldn't see. The joke was "...many of which you've never SEEN before".
I pointed out that people who could see probably did the shopping
I pointed out that people who could see probably did the shopping