As vein occlusions evolve, some normal vessels may dilate to compensate for the obstructed vein. Aspirin may be given to thin the blood, thus encouraging circulation. As soon as you notice a change in your central vision, you should contact Dr. Amaurosis fugal is a temporary episode of decreased vision, usually lasting no more than 10 to 15 minutes, that is sometimes described as “closing a curtain” on one eye. Such a distinction is relevant to the clinician, since two thirds of patients with the ischemic type develop the dreaded complications of macular enema, macular ischemia, and neovascularization that lead to blindness. The arteries are thinned. Uveitis can disappear within a few weeks or last longer. Arevalo HF, Garcia A, Wu L, et al. Inflammatory and infectious conditions which cause vasculitis such as sarcoidosis and tuberculosis are also risked factors for vein occlusion.
If you experience any change in your vision you should have your eye examined as soon as possible either by an optometrist or, if the sight loss happens quite quickly, by your local accident and emergency department. However in some people the inside of this tube becomes narrower or sticky which means it is harder for the blood to flow through it. Usually, the occlusion occurs at a site where an artery and vein cross. In severe cases of neovascularization, retinal detachment can occur from pulling by these vessels and associated scar tissue on the retina traction detachment. Philadelphia, PA: Elsevier; 2014:chap 6.18.