Ocular brachytherapy is a form of radiation therapy used to treat certain types of eye cancer, particularly intraocular melanoma and retinoblastoma.

Radioactive materials, such as plaques or seeds, are placed either on the surface of the eye or within the eye near the tumor. 

Once in place, the radioactive sources emit focused radiation directly on the tumor, destroying cancerous cells while minimizing harm to surrounding healthy tissue.

The duration of treatment varies depending on factors such as the type and size of the tumor, as well as the specific type of radioactive material used.

The ability to deliver radiation directly to the tumor allows for precise targeting and minimizes radiation exposure to surrounding healthy tissues.

Ocular brachytherapy may help preserve vision and maintain quality of life for patients with certain types of eye cancer.