Coloboma of the choroid and retina is a rare eye condition that is present at birth. It is caused by a defect in the development of the eye during the early stages of pregnancy. It is characterized by a gap or notch in the lower eyelid, the iris, the choroid, and/or the retina. This gap can cause vision problems, including decreased vision, decreased color vision, and decreased peripheral vision. Treatment for coloboma of the choroid and retina may include corrective lenses, surgery, or laser therapy.