![]() ![]() ![]() If we think of the eye as a camera and the macula is the film in the camera, then fluid leaking in the macula is like taking a picture with wet, warped film. This leakage of fluid can cause swelling and thickening of the macula, a condition known as macular edema. The 3 most common reasons people with retinal vein occlusions lose vision are listed below: The problem: Leakage of fluid into the macula.ĭamaged blood vessels in and near the macula (the central part of the retina) can leak fluid and blood. Because all or part of the retina may be affected, sometimes the vision loss may be only partial (that is, a part of the field of vision is lost) or total.īlocked blood vessels, particularly veins, can lead to many of the same types of damage that are found in diabetic eye disease. Just as with plumbing, blockages in larger blood vessels lead to more potential damage and vision loss. Blockages in either arteries or veins impair the circulation of the retina and can lead to painless vision loss. A blocked vein slows the exit of blood and the system backs up, causing blood and fluid to spill over into nearby areas of retina. A blocked artery decreases the blood coming in, and a result, the area of retina downstream of that artery becomes pale, sick and damaged. To view a PDF version of this information, click here.Ī simpler way to think of it is to imagine the blood vessels of the retina as plumbing. ![]()
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