Eye color - Wikipedia

How rare are grey blue eyes? - Quora

all hail the rat king

How do humans get yellow-green eyes? - Quora

Can an Asian woman and a green-eyed European man produce a baby with green eyes? - Quora

Eye Color: Physics or Genetics? - Atlantic Eye Institute, blue eye

Equine vision - Wikipedia

Tyndall effect - Wikipedia

Color vision - Wikipedia

Why Don't People Have Orange or Golden Eyes?, golden eyes

Eye color - Wikipedia

What Does Your Eye Color Say About You? - Color Meanings, golden eyes

Why do Jordanians, Syrians, and Lebanese have light colored eyes while Arabs in general have darker eyes? - Quora

For caucasians, what is the most common eye color? - Quora