One of my friends in college wants to find out if you need to have absolutely perfect vision in each eye to get your first-class medical. Her overall vision is 20/20, and the vision in her right eye is 20/20, but the vision in her left eye is off a little bit, like 20/40-50ish. She currently doesn't wear glasses or contacts. Would an examiner really deny her a first class medical certificate just because of this tiny problem?

Thanks for your help. This is really important to her.