Test to diagnose ‘face blindness’

Scientists have come up with a questionnaire they say should help diagnose a condition called face blindness.

Prosopagnosia, as doctors call it, affects around two in every 100 people in the UK and is the inability to recognise people by their faces alone, according to BBC.

In its most extreme form, people cannot even recognise their family or friends.

Milder forms, while still distressing, can be tricky to diagnose, which is why tests are needed.

People with prosopagnosia often use non-facial cues to recognise others, such as their hairstyle, clothes, voice, or distinctive features.

Some may be unaware they have the condition, instead believing they have a “bad memory for faces”. But prosopagnosia is entirely unrelated to intelligence or broader memory ability.

One [anonymous] person with prosopagnosia explains: “My biggest problem is seeing the difference between ordinary-looking people, especially faces with few specific traits.

“I work at a hospital with an awful lot of employees and I often introduce myself to colleagues with whom I have worked several times before. I also often have problems recognising my next-door neighbour, even though we have been neighbours for eight years now. She often changes clothes, hairstyle and hair colour. When I strive to recognise people, I try to use technical clues like clothing, hairstyle, scars, glasses, their dialect and so on.”

Doctors can use computer-based tests to see if people can spot famous faces and memorise and recognise a set of unfamiliar faces.

H.Z