CNS oxygen toxicity is the main form seen in diving. Pulmonary oxygen toxicity is not of concern except in very long technical dives (extended cave or rebreather dives, for example) lasting six to 12 hours or more.Prolonged dives within the safe limits for CNS oxygen toxicity may still cause ocular toxicity, which manifests as a narrowing of the visual field and myopia.ulmonary oxygen toxicity is not of concern except in very long technical dives (extended cave or rebreather dives, for example) lasting six to 12 hours or more. Prolonged dives within the safe limits for CNS oxygen toxicity may still cause ocular toxicity, which manifests as a narrowing of the visual field and myopia.
Back to top. 1  No. The Ergo is designed so that your baby is carried in a seated position which supports the spine by dispersing the weight of the head over the hips, thighs and spine. 2  Because of this healthy and Ergonomic design, it is not possible to wear your baby facing out.
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