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 vein occlusions typically occur in older patients with a history of high blood pressure and atherosclerosis. Other causes of retinal vein occlusion include vasculitis, clotting disorders, and medications such as oral contraceptive pills.
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.