Alexandria's Genesis is a rumoured mutation, turning people into long-living “perfect human beings” marked by purple eyes, extremely fair skin (that does not get sunburned), dark brown scalp hair (but no body hair), and other beauty traits to go with their strength and vitality. Rumours of this online go back to at least 2005 and a number of New Agers insist it's a genuine condition.
It's not; it was made up in 1939 (as a secret society bent on world domination) by pulp fiction writer Norvell Page. It was then incorporated into the back story of Aqualad's origin (in the February 1960 issue of DC Comics' AQUAMAN) as an Atlantean symbol of being cursed. Finally being utilized, in 1998, by Daria fanfic writer Cameron Aubernon to explain her Mary Sues. How it became a rumoured real mutation is unknown, and it greatly confused the writer herself.
Aubernon said on her tumblr it was "a projection of my personal gender identity and body image issues", as well as "simply a bad mashup of Daria, Art Bell, Twilight, witchcraft and Cylon skinjobs adopted by New Agers and others who should know better, but don’t and won’t."
Violet eyes ARE real, but only on albinos, and are only paired with very light, yellow hair or white hair, and extremely fair skin that is easy to sunburn. Albinos with this eye color can also gain weight. The real purple eyes are extremely light purple, mixed with a little blue and red. Albino model Nastya Kumarova has purple eyes.