Branch retinal artery occlusion

This type of occlusion occurs when a small branch retinal artery becomes blocked or clogged. Within the arteries of the retina, occlusions most often occur due to a clot that originates from another vessel in the body and finally lodges in a small branch retinal artery. 

When an occlusion occurs in a branch retinal artery, a small area of cells in the retina is deprived of oxygen. In occlusions that occur in branch retinal arteries, the affected cells most certainly die. Retinal artery occlusions occur suddenly, causing immediate and noticeable decreased vision in one eye. The vision loss is usually permanent, but often not as drastic as what occurs when the central retinal artery becomes blocked. 

There are ways to lessen the chance that a future occlusion will occur. Most people who have an occlusion in an artery of the retina have high blood pressure, high cholesterol, or some form of vessel disease. When proper steps are taken to control blood pressure, cholesterol, and blood sugar, the occurrence of another occlusion is much less likely.