Radiation therapy is widely used for the treatment of orbital tumors and inflammatory
disease. Both external beam teletherapy and implant brachytherapy radiation techniques
are employed. External beam radiation therapy is the most common. It involves directing an
external radiation source towards the eye, sinuses, and orbit. Whereas most patients are
treated with linear accelerator–derived external beam radiation therapy, proton, neutron
stereotactic radiosurgery, gamma knife, and intensity-modulated radiation therapy have …