PT  - JOURNAL ARTICLE
AU  - C Clarke
TI  - Contact lenses at high altitude: experience on Everest south-west face 1975.
AID  - 10.1136/bjo.60.6.479
DP  - 1976 Jun 01
TA  - British Journal of Ophthalmology
PG  - 479--480
VI  - 60
IP  - 6
4099  - http://bjo.bmj.com/content/60/6/479.short
4100  - http://bjo.bmj.com/content/60/6/479.full
SO  - Br J Ophthalmol1976 Jun 01; 60
AB  - 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.