The anatomy of the eye includes a web of veins that supply blood flow to the eye. If the veins become obstructed this is called vein occlusion. There are two types of vein occlusion. When the main vein becomes blocked, this is called central retinal vein occlusion (CRVO). However if the smaller surrounding veins become blocked it is called branch retinal vein occlusion (BRVO). Though there isn’t a cure for vein occlusion, the condition can be treated and maintained through laser and/or injections.
The videos below describe the injection procedure for CRVO and BRVO.