In central heterochromia there is a ring around the pupil or possibly spikes of different colors radiating from the pupil. Until , it was believed that there was a hierarchy of eye color. Brown was dominant over green, which was dominant over blue. Now it is proven that eye color is controlled by more than one gene; there have been 16 genes that contribute to eye color. Green eyes possess low to moderate amounts of melanin.
77 Best GREEN EYES images | Green eyes, Eyes, Beautiful eyes
Though the color green often is associated with envy even a character in Shakespeare's Othello refers to jealousy as "the green-ey'd monster" , many people consider green to be the most attractive eye color. In an online survey, AllAboutVision. Here are the preferences, from more than 66, responses:. Part of the appeal of green eyes may be their rarity.