Prosopagnosia

Prosopagnosia is a condition where a person can't recognize faces. It means that even if you know a person very well and you’ve seen them many times, you still won’t be able to recognize their face because your brain isn’t able to remember what their face looks like. This can make it very hard for people with prosopagnosia to recognize family or friends, or even to remember what someone looks like that they’ve only seen once.