Lucentis for Central Retinal Vein Occlusion (CRVO)

Inclusion Criteria: * Ability to provide written informed consent and comply with study assessments for the full duration of the study * Age \> 18 years * Clinical evidence of perfused central retinal vein occlusion. A central retinal vein occlusion (CRVO) is defined as an eye that has retinal hemorrhages and a dilated retinal venous system in all 4 quadrants. Other evidence of a CRVO may include telangiectatic capillary bed and collateral vessels at the optic nerve head. * Central macular edema present on clinical examination and OCT testing with a central point thickness \> 250 microns * Visual acuity score greater than or equal to 19 letters (20/400) and less than or equal to 73 letters (20/40) by the ETDRS visual acuity protocol. * Media clarity, pupillary dilation and patient cooperation sufficient to allow OCT testing and retinal photography Exclusion Criteria: * Pregnancy (positive pregnancy test) or known to be pregnant, also premenopausal women not using adequate contraception. * Participation in another simultaneous ocular investigation or trial * Patient with uncontrolled hypertension * Patient has a condition that, in the opinion of the investigator would preclude participation in the study (i.e. chronic alcoholism, drug abuse) * Patient has significant diabetic retinopathy (greater than moderate NPDR) or macular edema associated with diabetic retinopathy * Exam or OCT reveals evidence of vitreoretinal interface abnormality that may be contributing to the macular edema * Eye that in the investigator has no chance of improvement in visual acuity following resolution of macular edema (i.e subretinal fibrosis or geographic atrophy) * Presence of another ocular condition that may affect the visual acuity or macular edema during the course of the study (i.e AMD, uveitis, Irvine-Gas) * Evidence of neovascularization of the iris or retina (presence of ischemic CRVO) * Presence of substantial cataract, one that might decrease the vision by 3 or more lines of vision at sometime during the study. * History of Grid/Focal laser or Panretinal laser in the study eye * History of vitreous surgery in the study eye * History of use of intravitreal, peribulbar, or retrobulbar steroids within six months of the study. * History of Cataract Surgery within 6 months of enrollment. * History of YAG capsulotomy within 2 months of the surgery. * Visual acuity \<20/400 in the fellow eye * Uncontrolled Glaucoma, pressure \>30 despite treatment with glaucoma medications.