The retina consists of over one million nerve fibres, which connect directly to the brain, allowing us to make sense of our vision. Retinal swelling, bleeding and inflammation may have a variety of causes and consequences to your vision. Some retinal conditions that can cause blurry vision include Macular Degeneration (AMD), Epiretinal Membranes, Retinal Vein Occlusions and Macular Edema.