Floaters are spots in your vision and usually look like black or grey specs or cobwebs that drift about when you move your eyes. Dark spots or lines in your vision (floaters) are a symptom of retinal vein occlusion.
The retina, a light-sensitive tissue in the back of your eye, receives its blood supply through the retinal artery and retinal vein. When the vein becomes blocked, it’s called a retinal vein occlusion. When the vein is blocked, blood and fluid spill out into the retina. When this happens, the area of the retina called the macula may become swollen. The swelling affects your central vision.
High cholesterol is common in people with retinal vein occlusion. A 2008 study found that high cholesterol was twice as common in people with central retinal vein occlusion compared to people who did not have the eye condition. Other symptoms of retinal vein occlusion include change in vision in one eye, blurry vision in one eye and pain in the affected eye.