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.
1 The easiest way to correctly fold the fabric is to get the help of a friend or family member. 2  Your friend should hold the fabric out on the other side of the room, and you both should fold it in the same direction at the same time. 3  This is the fabric you'll use to make your patka, the wrapping under the actual pagh.ie the patka at the front top part of your head where your bun is. Keep in mind that it doesn't have to look perfect, as long as it holds your hair in place, since it won't be visible to people. Here's how you should go about tying it around your head: 1  Hold out the cloth in front of you.