How Much can you learn from Someone's Eyes??

Researchers from Orebro University conducted a study of the irises of 428 people in an attempt to see if personality can be ascertained just by looking into their eyes. They looked at the pits and line on the iris and gave each person a personality test. They concluded that general characteristics such as warm-heartedness and trust or neuroticism and impulsiveness, could be seen in the eyes. The major reason for this they say is the PAX6, a neurodevelopmental gene, which plays a role in determining iris color in an embryo and a mutation of this PAX6 is linked to impulsiveness and poor social skills.

http://news.bbc.co.uk/2/hi/health/6375381.stm