Retinal Vein Occlusion (RVO) is a condition that occurs when one of the veins in the retina becomes blocked, resulting in reduced blood flow and oxygen supply to the affected area of the retina. RVO can be classified into two main types: central retinal vein occlusion (CRVO) and branch retinal vein occlusion (BRVO), depending on the location and extent of the blockage. The blockage can be caused by a variety of factors, including blood clots, inflammation, and compression of the vein. Symptoms of RVO may include sudden or gradual vision loss, blurred or distorted vision, and the appearance of floaters or flashes of light. RVO is more common in older adults and those with certain medical conditions, such as high blood pressure and diabetes. Treatment options vary depending on the type and severity of RVO, but may include medications, laser therapy, and surgery in some cases.