The retina is nourished by blood flow, which provides nutrients and oxygen that nerve cells need. When there is a blockage in the veins into the retina, retinal vein occlusion may occur. Central retinal vein occlusion (CRVO) is a blockage of the main vein in the retina. Blockage of the small veins in the retina is called branch retinal vein occlusion. The blockage causes the walls of the vein to leak blood and excess fluid into the retina. When this fluid collects in the macula (the area of the retina responsible for central vision), vision becomes blurry.
Referral for a complete physical, with blood work and cardiovascular evaluation. Referral to the retinal specialist. If there is underlying leakage and fluid, treatment can be effective.