Mats Larsson, a psychology graduate student at Örebro University in Sweden has linked iris patterns to personality traits. Larsson took photos of 428 volunteers’ eyes and administered a standard personality test. He then counted the frequency of crypts (squiggly lines radiating out from the pupil) and furrows (circular lines curving around the outer edge of the iris). He found that a low frequency of crypts was significantly associated with tender-mindedness, warmth, trust, and positive emotions, whereas more distinct and extended furrows were associated with impulsiveness.
His results might seem strange, but Larsson notes that earlier studies have tenuously linked darker eyes to higher scores on extroversion, neuroticism, and sociability, although the effects seem to fade after early childhood. And, he adds, brain and eye development are closely linked in utero, so the appearance of distinctive eye traits might well be related to patterns of brain differences. For example, Larsson points ...
