Bevacizumab intravitreal injection in the treatment of patients with Central Retinal Vein Occlusion.

This study is testing whether an injection of a drug called Bevacizumab into the eye can help treat a condition called central retinal vein occlusion (CRVO). CRVO happens when a major vein in the retina (the back of the eye) becomes blocked, causing swelling and vision loss. Bevacizumab works by blocking a protein that causes abnormal blood vessel growth and swelling. This trial compares the injection treatment to a placebo (sham) treatment to see if it improves vision. You may be eligible if: - You are 18 years or older - You have swelling in the centre of the retina (macula) caused by central retinal vein occlusion - Your vision in the affected eye is between 20/40 and 20/320 (moderate to severe vision loss) You may NOT be eligible if: - You have diabetic macular oedema - You are pregnant or breastfeeding - You have uncontrolled high blood pressure or unstable heart disease - You have had certain recent eye surgeries or active eye infections - You have uncontrolled glaucoma Talk to your doctor about whether this trial might be right for you.