what is a nevus behind the eye?
01, 2016. A nevus is sometimes called a âfreckle of the eye.â It is a common, colored growth, similar to a mole on your skin. You can have a nevus in the front of your eye, around the iris, or under the retina at the back of the eye. A nevus under the retina is called a choroidal nevus. An eye nevus is usually harmless. However, it needs to be watched regularly because, like a skin mole, it could possibly develop into cancer of the eye.