Which of the following is a symptom of CNS O2 Toxicity?

Blurred vision is a recognized symptom of central nervous system (CNS) oxygen toxicity, which typically arises during hyperbaric oxygen therapy or when divers are exposed to high partial pressures of oxygen. This condition occurs when there is an inappropriate elevation of reactive oxygen species, leading to neuronal damage.

When the CNS is exposed to elevated levels of oxygen, it can lead to various neurological symptoms, including visual disturbances such as blurred vision. Other neurological effects might include seizures, tinnitus, and changes in consciousness depending on the severity and duration of exposure to high oxygen levels.

Decreased visual acuity or distorted vision is especially notable in cases where oxygen pressure is significantly increased, thus making blurred vision a key indicator of oxygen toxicity affecting the central nervous system. This reflects how the nervous system is particularly sensitive to oxidative stress and the impact that hyperoxia can have on brain function.