what is oxygen toxicity manifested as ?

Answer 1

when you are breathing concentrated amounts of oxygen (for a normal person, we are only breathing 21%) this can cause oxygen toxicity -- because the body will sense that there is too much oxygen so it will breathe less (HYPOventilation). among infants, this can cause blindness (retinopathy of prematurity/retrolental fibroplasia) and there are more side effects to it.

Answer 2

1

Answer 3

Oxygen toxicity or oxygen toxicity syndrome is severe hyperoxia caused by breathing oxygen at elevated partial pressures. The high concentration of oxygen damages cells.

The only manifestation that I know you can get from diving is: seizures.

Answer 4

In humans, there are several types of oxygen toxicity:

Central nervous system (CNS) oxygen toxicity is manifested as dizziness, nausea and twitching, especially on the face, leading to convulsions, which although not lethal themselves, can cause drowning of divers or lethal pressure damage during a rapid ascent to the surface.
The likelihood of this type of accident is directly proportional to the partial pressure of oxygen (ppO2) in the breathing gas and to the duration of exposure.

Pulmonary oxygen toxicity is caused by exposure over 16 hours to partial pressures of 0.5 bar or more causing breathing difficulty and pain resulting in lung damage which may be irreversible. This is a rare complication for divers, but may be of concern in intensive care patients needing high inspired oxygen concentrations.

Retinopathic oxygen toxicity causes damage to the retina. Oxygen may be a contributing factor for the disorder called retinopathy of prematurity.