In reading the wikipedia article on eye color, I noticed that the colors listed there seemed a bit arbitrary. Tangentially, I know that even the words we use today to recognize colors are neither old nor preserved through cultures, languages, or time. As an example, Spanish speaking peoples often use the word black to describe eye color, but English speaking peoples would say dark brown.
This left me wondering if the worldwide medical community (represented by the world health organisation or something else) has a distinct nomenclature for human eye colors. If they do, what are the various "official" eye colors?