Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. NEW! â The Mayo Clinic Diet, Second Edition. Relief for America's epidemic of indigestion. Keeping your bones healthy and strong.
Retinal cysts as in cystoid macular edema occur in the center, cause blurring and are due to inflammation, usually after surgery. Cysts in the peripheral retina are quite normal and are sometimes called cystic retinal tufts. Occasionally, cystic tufts can be torn by acute vitreous separation causing a retinal tear which may be lasered to prevent detachment. ...
When a retinal vein is blocked, it cannot drain blood from the retina. This leads to hemorrhages (bleeding) and leakage of fluid from the blocked blood vessels. There are two types of retinal vein occlusion: Central retinal vein occlusion (CRVO) is the blockage of the main retinal vein. Branch retinal vein occlusion (BRVO) is the blockage of one of the smaller branch veins. Nerve cells need a constant supply of blood to deliver oxygen and nutrients and blood vessels provide this supply.