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.

 

COMMON SIGNS:

  • blindness
  • walking into objects

COMMON CAUSES:

      • Inflammatory
        • encephalitis
      • Neoplastic
        • brain tumor
        • retrobulbar mass
      • Traumatic
        • head injury
      • Metabolic
        • anoxia
        • storage diseases
        • hepatoencephalopathy
      • Vascular