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Contact lenses at high altitude: experience on Everest south-west face 1975.
  1. C Clarke

    Abstract

    Five members of the British Everest Expedition 1975 were equipped with hydrogel contact lenses. Some clinical observations are made about the performance of these lenses. Two men were able to use them up to an altitude of 24,000 ft, where the ambient oxygen tension is of the order of 55 mmHg.

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