Abstract

Radiotherapy uses high- energy particles or waves, such as x-rays, gamma rays, electron beams or protons which makes small breaks in the DNA of cancer cells and makes them incapable of further growth and division, ultimately leading to cell death. In the field of ocular oncology, apart from surgery, laser, cryotherapy and chemotherapy, radiotherapy has emerged to be a robust and a reliable treatment modality for tumors of eyelids, conjunctiva, iris, choroid, retina, optic nerve, orbit and periorbital structures. Intricate orbital anatomy and varying susceptibility to radiation makes it challenging. This video covers all the aspects of radiotherapy related to ophthalmology, including basics, evolution in field of ocular oncology, indications, modalities used, dosimetry, current treatment protocols, endpoint of therapy, possible ocular and systemic complications and its management, contraindications and outcomes.