====== Central Retinal Artery Occlusion (CRAO) ======

===== Risk Factors/Causes =====

  * Atherosclerosis
  * Emboli
    * Cardiac sources:valves or myxoma
  * Coagulopathies
    * Sickle cell
    * Oral contraceptives
    * pregnancy
    * homocystinuria
    * platelet abnormalities
    * clotting factor abnormalities
    * Collagen vascular diseases
  * Ocular abnormalities
    * Arterial loops
    * optic disc drusen
  * Migraine
  * Hypotension
  * Trauma
  * Age
    * 60 + years old
  * Gender
    * more men than women are affected.
  * 1-2 % are bilateral