About Eye Cancer (Retinoblastoma)
Retinoblastoma is a rare eye cancer affecting about 300 children each year. The disease occurs most often in children under the age of 4 years, with 80% of cases occurring under age 3 years and virtually none above age 6 years. Most children (99%) with eye cancer will be cured.
Childhood retinoblastoma originates in a part of the eye called the retina. The retina is a thin layer of nerve tissue that coats the back of the eye and allows a person to see. Retinoblasts (immature cells of the retina) multiply during gestation and early life to make enough cells to create the retina. Retinoblastoma is a cancer that affects these retinoblasts, causing them to multiply too much, and not to mature fully (a process called differentiation). In children this can occur in one eye (unilateral) or both eyes (bilateral).