Most people do not realize that their ability to recognize faces is different from their recognition of other objects. But it turns out the human brain has a structure dedicated to telling faces apart. 

Without it, even highly perceptive people and those with photographic memories cannot learn your identity by looking at your face. At the same time, people with impaired memory and introverts can have a savant’s ability to recognize faces (which is known as super recognition).

Face-blindness is not a ‘spectrum’ disorder that a 'face-sighted' person can relate to through personal experience. It is not like ‘not being able to put a name to a face’ and it is not associated with memory or shyness. It can be acquired both genetically (as in my case) or from an injury or illness.

I cannot recognize faces of celebrities, friends, family, or even my own face (although I can deduce the identity of many people through context). 

Face-blindness is more common than you would think. Face-blind public figures include Jane Goodall, Oliver Sacks, Brad Pitt, Steve Wozniak, and Chuck Close. 

Many face-blind people mistake themselves for introverts, even if they have unmet social needs. Some avoid situations where they may be unexpectedly recognized to avoid the appearance of rudeness. I have overcome this inhibition.

It may take a frustratingly long time for me to remember your identity, but if you have a unique trait like an unusual hairstyle, a piece of jewelry you never remove, or a distinct voice, I will be more likely to identify and remember you.

Thank you for your understanding and for learning about this surprisingly common disorder.