Retinal vein occlusion (RVO) is a severe disease that occurs when a vein in the light-sensitive layer at the back of the eye (i.e., the retina) becomes blocked, which results in a loss of vision.

Injecting the eye with the corticosteroid triamcinolone appears effective in improving the vision of some patients with retinal vein occlusion, an important cause of vision loss that results from ...