Ophthalmology Book

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Orbicularis paralysisAka: Eyelid closure defect

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  1. Definition
    1. Orbicularis oculi muscle paralysis
    2. Results in failure of eyelid closure
  2. Causes
    1. CN 7 defect
      1. Bell's Palsy
    2. Severe Exophthalmos
    3. Lid spasm from sympathetic stimulation
  3. Complications
    1. Corneal Injury due to lack of protection, dryness

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