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Contact lenses in hypoxia
Author(s) -
Castrén Jorma,
Tuovinen Erkki,
Länsimies Esko,
Stenborg Tapio,
Aho Juhani,
Nedrum Klaus
Publication year - 1985
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1985.tb01560.x
Subject(s) - hypobaric chamber , ophthalmology , hypoxia (environmental) , medicine , decompression , optometry , effects of high altitude on humans , surgery , oxygen , anatomy , chemistry , organic chemistry
. Seven women with soft contact lenses were examined during a 4 h period in a decompression chamber. The atmospheric pressure was lowered from the normal value of 1000 millibars (750 mmHg) to 560 millibars (420 mmHg), which corresponds to the altitude of 4000 m above sea level. The humidity, temperature, percentage of carbon acid and illumination were attempted to be kept even. Five test subjects developed subjective, and all the 7 also developed objective eye symptoms. It was concluded that hypoxia itself may cause eye discomfort for aircraft passengers with contact lenses. The most serious objective findings were corneal erosions in 3 and opacities of corneal stroma in 5 test persons. The control group without contact lenses did not develop any symptoms during the test.