New comic for the week!
This might have happened to some people before. Usually for people who lack attentiveness do something similar to this. It’s not really a blind joke, but rather it has more to do with not paying attention. Sometimes people can mistake their friends or family with other people, as they are following behind them. You won’t notice something is wrong until they turn around, or something like that. In this case, I can imagine Risa to be both inattentive and poor in vision.