yardman
Afro-pessimist
They're albinos. Blue, green and hazel eyes are forms of albinism. It's called ocular albinism. Just like red, blonde and brown hair is albinism manifested in the hair follicles. For instance Spain and Italy were blonde haired and blue eyed and look what a little intermixing with Arabs and Africans did. You got black haired and dark brown eyed caucasians.