This is beautiful Vanessa, and the black spot you can see in her right eye is called a Coloboma (it's an actual hole in her eye's iris).
A Coloboma is rare eye condition. It is a cleft, usually due to incomplete embryologic development in utero, i.e. it's a birth defect. An iris coloboma is the most common eye coloboma; the pupil will often look like a keyhole or upside-down pear.
For more information about Coloboma, read en.wikipedia.org/wiki/Coloboma.
Photo taken at the LovEvolution / Love Fest Festival (San Francisco).
Some of Vanessa's work can be seen here: