RT Book, Section A1 Saraiya, Nehali Vira A1 Daily, Mark J. A1 Jay, Walter M. A2 Dieter, Robert S. A2 Dieter, Raymond A. A2 Dieter, Raymond A. SR Print(0) ID 1126490497 T1 Venous Diseases of the Eye T2 Venous and Lymphatic Diseases YR 2011 FD 2011 PB McGraw-Hill Medical PP New York, NY SN 9780071601580 LK accesscardiology.mhmedical.com/content.aspx?aid=1126490497 RD 2024/10/15 AB Retinal vein occlusion is the second most common retinal vascular disease after diabetic retinopathy.1 Obstruction of any of the venous vessels within the retinal vascular system results in changes in both the appearance of the fundus and the function of the retina. Blockage of a retinal vein causes elevated venous and intracapillary pressures and subsequent slowing of the arterial blood flow in the region drained by the vein. The visual defects and retinal damage from the venous obstruction depend primarily on the rapidity of its development, the severity of the occlusion, and the availability of collateral pathways of venous outflow.