Where did you find those percentages? In Italy there are not areas where 50% of the population have light eyes, and in Sardinia, according studies made in the 80's, the avarage % of light eyes (grey and green) is 16%
2% means 2 person in a group of 100!
http://www.persee.fr/web/revues/home..._num_10_2_3898

