What can happen if a diver exceeds the recommended oxygen exposure limit?

Exceeding the recommended oxygen exposure limit can result in central nervous system oxygen toxicity. This condition occurs when there is an excessive amount of oxygen in the body, particularly impacting the central nervous system. Symptoms may include visual disturbances, tinnitus, nausea, twitching, irritability, and in severe cases, convulsions and loss of consciousness. The critical factor in this situation is that increasing oxygen levels leads to heightened partial pressure, which can have toxic effects on the body, especially during deeper dives where the pressure is already increased. Therefore, understanding and adhering to the limits of oxygen exposure is vital for ensuring safe diving practices and protecting divers from the harmful effects of oxygen toxicity.