Retinoblastoma is a rare form of cancer that develops in the retina, the light-sensitive tissue located in the back of the eye. It primarily affects young children and is usually diagnosed before the age of 5.
Some common symptoms of retinoblastoma include a white pupil (known as leukocoria), crossed or misaligned eyes (strabismus), redness and swelling of the eye, and poor vision or loss of vision.