Vision In order to "see", the following structures must function properly:
  1. eye & retina
  2. optic nerve
  3. brain
Patient’s with a problem in the eye, retina, or nerves will have an abnormal pupillary light response (PLR) while patients with a problem in the brain (e.g. cortical blindness) will have a normal PLR.
  • blindness
  • walking into objects
      • Inflammatory
        • encephalitis
      • Neoplastic
        • brain tumor
        • retrobulbar mass
      • Traumatic
        • head injury
      • Metabolic
        • anoxia
        • storage diseases
        • hepatoencephalopathy
      • Vascular