A choroidal nevus (kuh-roid-ul knee-vuss) is a benign pigmented spot like a freckle or mole located on the layer under the retina known as the choroid.

Nevi are common in people with light colored skin and eyes and who are often exposed to sunlight. They are also more common in people between the ages of 50 and 70.

Nevi do not have any symptoms and usually have no effect on vision. However, a very small fraction of nevi can sometimes develop into a choroidal melanoma, or a tumor, which may require laser treatment or radiation therapy.

It is very important to have your eyes dilated at least once every year to monitor the stability of a nevus and note any changes in its size or shape. Be sure to wear UV-protecting sunglasses when outdoors, even at an early age.