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.
Torn retina and retinal detachment causes include the vitreous gel shrinking and pulling away from the retina, and fluid passing through retinal tears, lifting Torn retina and retinal detachment causes include the vitreous gel shrinking and pulling away from the retina, and fluid passing through retinal tears, lifting the retina off the back of the eye. Subspecialties