@doonxib @judgedread Blindness is not inheritable, it's a pathological condition like Downs syndrome - congenital but not inheritable. Most of the detrimental mutations in the genome are on recessive alleles or (as in the case of niggers) were beneficial until the environment changed.

And if you'd watched that 15-minute Dawkins video (in the 5 minutes it took you write a dismissive reply about it), you'd have understood why half an eye is perfectly serviceable in a world of the blind, ensuring that half-eyed creatures would quickly come to dominate a population.