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Article
April 1944

PRACTICABILITY OF USE OF CONTACT LENSES AT LOW ATMOSPHERIC PRESSURES

Arch Ophthalmol. 1944;31(4):326-328. doi:10.1001/archopht.1944.00890040064011
Abstract

Present standards for personnel of military planes require that crew members have good vision without glasses. The use of ordinary spectacles is considered impractical. Since many persons otherwise qualified are excluded from this branch of the service, in a time of great need, by reason of ametropia, the question may be fairly asked, "Can contact lenses be used practicably in planes at the altitudes commonly attained in modern warfare?" The observations here reported were made in an attempt to answer this question.

Numerous studies of ocular function have been made under conditions of low atmospheric pressure, and hence low partial pressure of oxygen. These studies were reviewed by McFarland, Evans and Halperin.1 In modern flying, plane personnel need not experience lack of oxygen, since oxygen may be supplied by means of a mask. A normal supply of oxygen to the cornea via the blood stream and the intraocular fluid

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