Radiotherapy uses high energy waves similar to x-rays to kill eye cancer cells.
Radiotherapy is a common treatment for melanoma of the eye, particularly for those that are small or medium sized.
Internal radiotherapy is also called brachytherapy. A small disc called a plaque is placed on the eye to treat some eye cancers.
This means directing radiotherapy beams at the tumour from outside the eye.
Radiotherapy for eye cancer has some side effects. These depend on which part of your eye has been treated.