Ocular cancers are a group of rare, life-threatening conditions that affect one or both eyes. The main indications include choroidal melanoma, choroidal metastasis, cancers of the ocular surface and retinoblastoma, among others. Diagnosing and treating these cancers early is important because they have the potential to spread both within the eye and/or to other organs. The risk of ocular cancer increases with age, increasing significantly after the age of 50. For choroidal melanoma, our lead indication the typical treatment is radiotherapy in the form of either plaque brachytherapy or proton beam therapy, but these treatments are highly invasive, and result in major vision loss and other comorbidities for many patients.