Webster Dictionary(0.00 / 0 votes)Rate this definition: Freebase(0.00 / 0 votes)Rate this definition: Crenulation or Crenulation cleavage is a texture formed in metamorphic rocks such as phyllite, schist and some gneiss by two or more stress directions resulting in superimposed foliations.
Retinal artery occlusion. Retinal artery occlusion is a blockage in one of the small arteries that carry blood to the retina. The retina is a layer of tissue in the back of the eye that is able to sense light. Causes. Retinal arteries may become blocked when a blood clot or fat deposits get stuck in the arteries.
If this swelling improves and the blood that has leaked is reabsorbed then you may notice an improvement in your sight. There are three current treatments which can be used for macular swelling caused by retinal vessel occlusion: laser surgery, treatment with steroid injections and injections of anti VEGF medications.f this swelling improves and the blood that has leaked is reabsorbed then you may notice an improvement in your sight. There are three current treatments which can be used for macular swelling caused by retinal vessel occlusion: laser surgery, treatment with steroid injections and injections of anti VEGF medications.