“Ich schau dir in die Augen kleines”
(german: “I look into your eyes, honey”)
This is one of the most famous quotes from the german-dubbed movie Casablanca. One reason could be, that a look in someone’s eyes can be a very intimate moment and stimulate all kinds of different emotions.
Psychologists conducted a study, showing that people with brown eyes appear more dominant. In their study, they took profile pictures of 40 men and women each between 19 and 26 years of age. After showing these pictures to a group of 62 people, they asked them to judge the photographs for perceived dominance and attractiveness on a scale from 1 to 10. The first conclusion was that brown-eyed people were perceived as more dominant. After that they changed the eye colour in the pictures using photo-editing software. When they repeated the experiment with another group of people, the original dominance ratings remained the same. So, although, the eye colour was a measurable factor for the perceived dominance in the first round, it suddenly wasn’t in the second round.
So is there a genetic link between iris colour and other charateristic marks in peoples faces, or is it a social link? The authors made suggestion, but it still remains unclear.
 Kleisner, K., et al., Personality and Individual Differences, 49(2010), 59-64.
 Frost, P. Evolution and Human Behavior, 27 (2006), 85-103.
 Bassett, J.F., Personality and Individual Differences, 31 (2001), 535-539.