I'm curious if a difference in cone density or distribution could be the differentiator. https://theneurosphere.com/2015/12/17/the-mystery-of-tetrachromacy-if-

I'm curious if a difference in cone density or distribution could be the differentiator. https://theneurosphere.com/2015/12/17/the-mystery-of-tetrachromacy-if-12-of-women-have-four-cone-types-in-their-eyes-why-do-so-few-of-them-actually-see-more-colours/ https://theneurosphere.com/2015/12/17/the-mystery-of-tetrach...