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This book summarizes current understanding of the scientific, clinical, and technical issues surrounding the use of contact lenses. It discusses the special occupational conditions experienced by military personnel, particularly in extreme environments, that give rise to the question of whether or not to use contact lenses. Experts in optometry, ophthalmology, visual psychophysics, and engineering describe recent developments in design and use; and representatives of the military services provide examples of actual situations in aerospace settings. Considerations in Contact Lens Use Under Adverse Conditions will be of particular interest to those involved in the design of contact lenses and those responsible for occupational safety and health matters in the private sector.Table of Contents Front Matter Contact Lenses and the Eye: Basic Considerations Environmental Gases and Contact Lens Wear Hypoxia Contact Lenses and Corneal Energy Metabolites in the Rabbit Environmental Conditions and Tear Chemistry Tear Evaporation Considerations and Contact Lens Wear Mechanical Aspects of Soft Contact Lenses Contact Lenses and the Eye: Complications Medical Problems Associated With Contact Lens Use Adverse Reactions Associated With Contact Lens Use Corneal Topography and Contact Lenses Treatment of Giant Papillary Conjunctivitis Endothelial Effects From Contact Lens Wear Contact Lenses and the Eye: Practical Considerations in Everydayand Military Life Corneal Effects of Extreme Environments: Considerations for PilotsWearing Contact Lenses Effect of Aircraft Cabin Altitude and Humidity on Oxygen TensionUnder Soft and Hard Gas-Permeable Contact Lenses Ocular Occupational Health Concerns: Considerations for Pilotswearing Contact Lenses Lens Performance Considerations Vision Performance With Contact Lenses An Overview of U.S. Army Aviation and Contact Lens Issues Contact Lens Wear in the Aerospace Environment Use of Soft Contact Lenses by Tactical Aircrews Job Demands in Naval Aviation Extended-Wear Lenses: The U.S. Navy's Experience