What Is It?
Retinoblastoma is a form of cancer that develops on the retina. The retina is the structure at the back of the eye that senses light. It sends images to the brain which interprets them. In short, the retina allows us to see.
Although rare, retinoblastoma is the most common eye tumor in children. In most cases, it affects youngsters before age 5. It causes 5% of childhood blindness. But with treatment, the vast majority of patients maintain their sight.
About 40% of retinoblastoma cases are hereditary. This form of the disease usually affects children under age 2. It can affect one eye (unilateral) or both (bilateral).