Gamma Knife is used to treat brain tumors and vascular  malformations. Certain functional disorders such as trigeminal neuralgia, intractable pain, certain psychiatric disorders (Obsessive compulsive disorder), Epilepsy, Parkinson's disease and Ocular conditions (Advanced Glaucoma , malignant melanoma , Intraocular and Intra orbital metastasis, hemangioblastoma, age- related macular degeneration  ) can also be treated using the Gamma Knife Radiosurgery.