Biomaterial Database

Low atmospheric pressure effects on wearing soft contact lenses. 1978

W G Eng, and J L Rasco, and J A Marano

The majority of all research in the field of contact lenses has taken place in a normal, ground-level environment. The purpose of this study was to determine if any changes occurred in wearing hydrophilic soft lenses under conditions of low atmospheric pressures. The effects on visual acuity, refraction, keratometry, and biomicroscopy were investigated with eight naval volunteers while wearing soft contact lenses at simulated altitudes up to 30,000 ft (9144 m) in an aviation hypobaric chamber. The results indicated that the low atmospheric pressure at high atitude in itself did not affect the fit of soft contact lenses.

UI	MeSH Term	Description	Entries
D003263	Contact Lenses, Hydrophilic	Soft, supple contact lenses made of plastic polymers which interact readily with water molecules. Many types are available, including continuous and extended-wear versions, which are gas-permeable and easily sterilized.	Lenses, Contact, Hydrophilic,Soft Contact Lenses,Hydrophilic Contact Lens,Soft Contact Lens,Contact Lens, Hydrophilic,Contact Lens, Soft,Contact Lenses, Soft,Hydrophilic Contact Lenses,Lens, Hydrophilic Contact,Lens, Soft Contact,Lenses, Hydrophilic Contact,Lenses, Soft Contact
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000337	Aerospace Medicine	That branch of medicine dealing with the studies and effects of flight through the atmosphere or in space upon the human body and with the prevention or cure of physiological or psychological malfunctions arising from these effects. (from NASA Thesaurus)	Aviation Medicine,Space Medicine,Medicine, Aerospace,Medicine, Aviation,Medicine, Space
D001274	Atmospheric Pressure	The pressure at any point in an atmosphere due solely to the weight of the atmospheric gases above the point concerned.	Atmospheric Pressures,Pressure, Atmospheric,Pressures, Atmospheric
D014787	Vision Tests	A series of tests used to assess various functions of the eyes.	Test, Vision,Tests, Vision,Vision Test
D014792	Visual Acuity	Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.	Acuities, Visual,Acuity, Visual,Visual Acuities