The Use Of Bifocal Soft Contact Lenses In The Fort Rucker Aviation Environment
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The Use Of Bifocal Soft Contact Lenses In The Fort Rucker Aviation Environment
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Author :
language : en
Publisher:
Release Date : 1997
The Use Of Bifocal Soft Contact Lenses In The Fort Rucker Aviation Environment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
There are problems with the compatibility of spectacles and certain helmet mounted electro-optical visual display systems. The incompatibility has been partially resolved with single vision contact lenses. However, these contact lenses have not helped senior aviators, who must wear bifocal glasses due to their presbyopia. The purpose of this study was to compare the performance of bifocal soft contact lenses with that of bifocal spectacle lenses to determine if contact lenses are an option for helping older aviators meet the visual requirements needed to fly military aircraft. Seventeen volunteer presbyopic aviators from Fort Rucker were fitted with five bifocal soft contact lens combinations and bifocal glasses. A four-phase investigation was conducted: a clinical phase involving the fitting of the bifocal contact lenses; a laboratory phase involving measurements of visual functions; a simulator phase involving measures of visual performance in simulated flight conditions; and an operational phase consisting of subjective responses regarding in-flight use of bifocal contact lenses. In general, vision in the best performing bifocal contact lenses typically was slightly reduced from vision in bifocal spectacles. The amount of the reduction, and whether it was clinically significant, depended on the refractive error of the subject (myopes generally performed better), the add group of the subject (low add group subjects performed better), and the type of bifocal contact lens. Aviators performed flight simulation maneuvers better in bifocal contact lenses than in bifocal glasses, and they evaluated their own ease of vision while performing aviation duties to be much easier in bifocal contact lenses than in bifocal glasses. In actual flight operations, each aviator preferred bifocal contact lenses over bifocal spectacles. Bifocal soft contact lenses are an acceptable.
The Use Of Bifocal Soft Contact Lenses In The Fort Rucker Aviation Environment
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Author : Stephen E. Morse
language : en
Publisher:
Release Date : 1997-08-01
The Use Of Bifocal Soft Contact Lenses In The Fort Rucker Aviation Environment written by Stephen E. Morse and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-08-01 with Bifocal lenses categories.
There are problems with the compatibility of spectacles and certain helmet mounted electro-optical visual display systems. The incompatibility has been partially resolved with single vision contact lenses. However, these contact lenses have not helped senior aviators, who must wear bifocal glasses due to their presbyopia. The purpose of this study was to compare the performance of bifocal soft contact lenses with that of bifocal spectacle lenses to determine if contact lenses are an option for helping older aviators meet the visual requirements needed to fly military aircraft. Seventeen volunteer presbyopic aviators from Fort Rucker were fitted with five bifocal soft contact lens combinations and bifocal glasses. A four-phase investigation was conducted: a clinical phase involving the fitting of the bifocal contact lenses; a laboratory phase involving measurements of visual functions; a simulator phase involving measures of visual performance in simulated flight conditions; and an operational phase consisting of subjective responses regarding in-flight use of bifocal contact lenses. In general, vision in the best performing bifocal contact lenses typically was slightly reduced from vision in bifocal spectacles. The amount of the reduction, and whether it was clinically significant, depended on the refractive error of the subject (myopes generally performed better), the add group of the subject (low add group subjects performed better), and the type of bifocal contact lens. Aviators performed flight simulation maneuvers better in bifocal contact lenses than in bifocal glasses, and they evaluated their own ease of vision while performing aviation duties to be much easier in bifocal contact lenses than in bifocal glasses. In actual flight operations, each aviator preferred bifocal contact lenses over bifocal spectacles. Bifocal soft contact lenses are an acceptable
Contact Lens Use Under Adverse Conditions
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Author : Working Group on Contact Lens Use Under Adverse Conditions
language : en
Publisher: National Academies Press
Release Date : 1990-01-01
Contact Lens Use Under Adverse Conditions written by Working Group on Contact Lens Use Under Adverse Conditions and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990-01-01 with Medical categories.
Current Aeromedical Issues In Rotary Wing Operations
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Author :
language : en
Publisher:
Release Date : 1999
Current Aeromedical Issues In Rotary Wing Operations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Aeron categories.
Given its characteristics and the complexity of its use and its environment, the helicopter is exposed to damage and a whole series of measures can be previewed to alientate this risk. The presentations concentrated on five main topics: 1. Crew training; 2. The different conditions of use; 3. The psycho-physiological component; 4. Survival equipment and methods; and 5. Accidents and their prevention. A careful reading of the papers presented at the symposium will enable both specialists and decision-makers to make a summary assessment of the constraints of the missions on the one hand, and on the other, of the new methods of protection and training and the new technologies which will enable aircrew to carry out their missions in a safer environment. In addition, they will perhaps discover that helicopter operation can be optimised by a series of different devices and above all by judicious matching of "type of helicopter-type of aircrew training-type of additional on-board equipment".
Preliminary Evaluation Of Visual And Flight Performance Of Three Current Multifocal Contact Lens Designs For Presbyopic U S Army Aviators
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Author :
language : en
Publisher:
Release Date : 2005
Preliminary Evaluation Of Visual And Flight Performance Of Three Current Multifocal Contact Lens Designs For Presbyopic U S Army Aviators written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
U.S. Army aviators have been authorized to wear contact lenses for aviation duties with special waiver since 1991. The authorized contact lens modality is the single-vision soft contact lens that corrects for 20/20 distance and near. As aviators become presbyopic, they often have to return to bifocal spectacle wear or readers over their distance contact lenses in order to complete their aviation duties. Spectacles introduce interface problems with head-mounted displays and night vision goggles. This pilot study evaluated the potential utility of multifocal contact lenses to provide adequate visual and flight performance for presbyopic aviators. Bifocal spectacles or readers provide better levels of visual performance than any of the three multifocal contact lenses evaluated. Flight performance in a UH-60 simulator under daytime conditions was not decremented with the multifocal contact lenses evaluated in this study; however, this study did not evaluate night flight, interface with head-mounted displays or night vision goggle flight performance. Studies specific to the Apache flight environment are being considered since visual performance remained within norms and Apache pilots are faced with greater interface problems with bifocal spectacles and head-mounted displays and protection mask configurations than pilots in other aviation platforms. Many Apache pilots have been permanently Wounded or converted to other platforms due to the onset of presbyopia and spectacle compatibility issues in the cockpit Multifocal contact lenses, when fit to specific parameters, may be an option under special circumstances where spectacles would lead to reduced performance.
Preliminary Evaluation Of Visual And Flight Performance Of Three Current Multifocal Contact Lens Designs For Presbyopic Us Army Aviators
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Author :
language : en
Publisher:
Release Date : 2005
Preliminary Evaluation Of Visual And Flight Performance Of Three Current Multifocal Contact Lens Designs For Presbyopic Us Army Aviators written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
U.S. Army aviators have been authorized to wear contact lenses for aviation duties with special waiver since 1991. The authorized contact lens modality is the single-vision soft contact lens that corrects for 20/20 distance and near. As aviators become presbyopic, they often have to return to bifocal spectacle wear or readers over their distance contact lenses in order to complete their aviation duties. Spectacles introduce interface problems with head-mounted displays and night vision goggles. This pilot study evaluated the potential utility of multifocal contact lenses to provide adequate visual and flight performance for presbyopic aviators. Bifocal spectacles or readers provide better levels of visual performance than any of the three multifocal contact lenses evaluated. Flight performance in a UH-60 simulator under daytime conditions was not decremented with the multifocal contact lenses evaluated in this study; however, this study did not evaluate night flight, interface with head-mounted displays or night vision goggle flight performance. Studies specific to the Apache flight environment are being considered since visual performance remained within norms and Apache pilots are faced with greater interface problems with bifocal spectacles and head-mounted displays and protection mask configurations than pilots in other aviation platforms. Many Apache pilots have been permanently Wounded or converted to other platforms due to the onset of presbyopia and spectacle compatibility issues in the cockpit Multifocal contact lenses, when fit to specific parameters, may be an option under special circumstances where spectacles would lead to reduced performance.
Aviation Space And Environmental Medicine
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Author :
language : en
Publisher:
Release Date : 1990
Aviation Space And Environmental Medicine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Aviation medicine categories.
Helmet And Head Mounted Displays
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Author :
language : en
Publisher:
Release Date : 2002
Helmet And Head Mounted Displays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Aeronautical instruments categories.
The Use Of Extended Wear Contact Lenses In The Aviation Environment An Army Wide Study
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Author :
language : en
Publisher:
Release Date : 1992
The Use Of Extended Wear Contact Lenses In The Aviation Environment An Army Wide Study written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Standard refractive error correction options for the M-43 protective mask have proven to be incompatible with the Helmet Display Unit (HDU) component of the AH-64 Apache Integrated Helmet and Display Sighting System (IHADSS). Glue-on and outsert packages push the HDU, a Maxwellian- view virtual imaging system, far enough from the spectacle-, earing aviator's eye to significantly reduce the available field-of-view. Consequently, portions of critical peripheral instrumentation and weapon system overlays cannot be visualized. In November 1988, the U.S. Army Aeromedical Research Laboratory (USAARL) initiated the AH-64 contact lens research protocol to provide both an interim readiness fix and to develop a comprehensive database on contact lens wear in a variety of environments. The protocol was organized from three perspectives with concerns directed toward operational and flight safety, ocular health, and corneal physiology issues, and concluded at the end of September 1991. Fundamental operational and safety data were chronicled, along with written questionnaires, to assess subjective effectiveness of routine contact lens use. ocular health complications were collated from the aviation medicine, optometric, and ophthalmological communities. Clinical and physiological data were gathered by one USAARL optometrist, and two contract civilian optometrists and their supporting technicians.
Contact Lens Use In The Civil Airman Population
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Author : Van B. Nakagawara
language : en
Publisher:
Release Date : 2002
Contact Lens Use In The Civil Airman Population written by Van B. Nakagawara and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Air pilots categories.