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Your retina has arteries and veins that transport blood and oxygen. Your veins can be occluded, or blocked, leading to painless vision loss. Depending on which veins are blocked, your vision loss may be mild to severe. When there is blockage of the retinal vein, the retina suffers hemorrhaging, and can develop macular edema (swelling in the central vision area). By treating the macular edema, your vision may stabilize and possibly improve. The treatment involves laser treatments and / or medicines that are administered by injection into the affected eye, similar to the treatments for “wet” age-related macular degeneration. Your retina specialist can determine which treatment is best for you.