This study is an open-label, Phase I study of intravitreally administered ranibizumab in subjects with radiation retinopathy. This is a single center, non-randomized, active treatment study involving 10 consecutive patients. This study will evaluate the safety and tolerability of a high dose (2.0 mg) intravitreal ranibizumab and its effect on regression of radiation retinopathy and mean change in visual acuity.