what is retinoblastoma
retinoblastoma is a disease in which malignant cancer cells form in the tissues of the retina the retina is the nerve tissue that lines the inside of the back of the eye the retina senses light and sends images to the brain by way of the optic nerven intraocular retinoblastoma cancer is found in one or both eyes and may be in the retina only or may also be in other parts of the eye such as the choroid ciliary body or part of the optic nerve cancer has not spread to tissues around the outside of the eye or to other parts of the body