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.

Treatment

• 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.