Is it normal to forget people's faces?
So everytime I try to remember someone's face I just can't. I mean I get impressions of things like hair-color and the like but besides that I can't remember anything else. It's not just acquaintances it's family members that I see everyday of my life. Also I don't see resembleces like other people do (I.e. "oh he has his mother's eyes", or "they definitely look like sisters")
Is it normal to do this or do I have some kind of facial recognition disorder?