I was waiting for the train to depart after work last year, reading my book, when a couple sat opposite me in the priority seating (they weren't elderly, pregnant, with a pram, or disabled). They struck me as a rough and ready sort, not necessarily bad, but blue collar working class types not generally associated with keen intellect.

The bloke, noting my Vision Impaired Person badge, said "If he's blind, how can he read?" His missus responded to him "He might still be able to see some, like his peripheral vision might be gone but he might still have central vision." I smiled to myself. I did contemplate speaking up and saying "Your missus has got it in one mate!" but I was content enough that she knew her stuff (which pleasantly surprised me) even though they were having a conversation about me within my hearing without including me in that conversation.

I've also always wanted to say to people who offer me seats on the train "It's me eyes that're shot, not me legs", but I've abstained thus far. They're just being polite/kind after all and it's a bit of a harsh response. (I never accept offers of a seat, I spend all day sitting at the office, I prefer to stand).

I've had drunk people do that to me in bars when I'm holding a white cane, so I feel for ya!

I'm the opposite, I've no peripheral and I don't use my right eye, but decent central in my left (20pt is what I can read comfortabley, but I can push myself smaller). For many years I didn't like using a cane because people assume you can't see anything at all. I don't worry about that now, and having a cane and badge has saved me from the displeasure of others on more than one occasion after I've bumped into them or blocked their path.