What happens if I make a mistake answering during an eye test?

This may fit better in another sub, but I thought I’d give this one a try. When you go to the eye doctor and they ask you, “which one looks better, 1 or 2”, what happens if you feel that 1 looks better but 2 is actually better? Do you end up getting the wrong description? I want to think that they ask it so many times with so many different lens strengths that this wouldn’t happen but I’ve always pondered whether my own mistake/indecision could wind up with me getting the wrong prescription.