Retinal vein occlusion
Retinal vein occlusion is a blockage/clot in the small veins that connect to the retina (tissue on the back of the eye that sends light, images and signals to the brain).
The blockages can cause blood vessels to break and bleed due to the build up of pressure.
This usually occurs when a person has underlying health issues such as high cholesterol, high blood pressure and diabetes.
Symptoms of a retinal vein occlusion involves sudden vision loss, either full or part of your visual field in one eye.