In this prospective pilot study the investigators propose that patients will undergo standard plaque placement for treatment of their ocular melanoma in addition to pars plana vitrectomy and silicone oil infusion. When patients return for their scheduled plaque removal one week later, they will also undergo removal of the silicone oil from the eye. Placement of silicone oil should not alter the radiation dose delivered to the tumor, as there is no physical space between the tumor and the radioactive plaque for silicone oil to be present. The reduction in radiation to healthy ocular structures by using the oil technique may be sufficient to avoid the clinical complications caused by radiation-induced injury.