I notice often when other people have worse eyesight then me, it wouldn't surprise me if you're unaware of how good your eyesight actually is and/or your friend

I notice often when other people have worse eyesight then me, it wouldn't surprise me if you're unaware of how good your eyesight actually is and/or your friend believes their eyesight is at least above average (at least with glasses) when maybe it's not.