The Effect of Oxygen Toxicity on the Eye

Manifestations of oxygen Toxicity

  • eyelid twitching is the most commonly seen manifestation of O2 toxicity and usually is a warning that a full-blown seizure is imminent.
  • blurred vision
  • visual field constriction
  • visual hallucinations
  • transient one-sided loss of vision
  • reversible after termination of the O2 exposure.


  • Removal of the O2 source immediately.
  • No residua unless secondary trauma or near-drowning occur from a convulsion.

Prevented by using appropriate O2 concentrations at proper depths.


Ernest S. Campbell, M.D., FACS

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