IANTD Enriched Air Nitrox Practice Test 2025 – Complete Exam Prep

Oxygen toxicity is a condition that can occur when a person breathes oxygen at elevated partial pressures for prolonged periods. One of the significant effects of oxygen toxicity on mental functions includes visual disturbances, such as blurred vision, tunnel vision, and in severe cases, seizures. These symptoms arise from the central nervous system being affected by excessive oxygen, leading to increased neuronal activity which can cause adverse effects.

In the context of the options given, visual disturbances or seizures are direct manifestations of oxygen toxicity on mental functioning. This highlights the importance of understanding the risks associated with high levels of oxygen in diving and other applications where enriched air is used. Enhanced problem-solving ability, improved memory retention, and quicker reflexes, while potentially beneficial traits, do not represent the negative effects caused by oxygen toxicity. Understanding these risks is essential for divers and those involved in hyperbaric medicine.