Farr W D
Department of Pathology, Brooke Army Medical Center, Fort Sam Houston, TX.
Aviat Space Environ Med. 1989 Oct;60(10 Pt 2):B78-80.
With the advent of the night vision goggle (NVG) mission requirements in the United States Army, the reserve components began training with the second generation (AN/PVS-5 & AN/PVS-5A) systems. These systems prohibit the wear of spectacles by the aviator. Certain modifications on some systems allowed for spectacle wear. However, there still exists a 5-h day filter training minimum in which the full NVG with facemask and cushion must be worn without spectacles. The NVG system corrects up to +2.00 diopters of hyperopia and up to -6.00 diopters of myopia, but only +/- 1.00 diopter of astigmatism. A survey of the reserve component (USAR and NG) aviators in the Southwest was conducted to establish the relative incompatibility of the NVG system among an aviator population older than the active component aviators. All medical record custodians received questionnaires and the flight surgeon followed up replies by telephone or on-site visits. We screened a total of 127 aviator records. The aviator's average age was 39.5 years; 65.3% had 20/20 vision and were emmetropes. Of those that wore spectacles, 82.4% had hyperopia or myopia correctable by the built-in optical adjustments contained in the NVG. The other 17.6%, who had vision that exceeded the correction factors built into the NVG, consisted of astigmats with greater than 2.00 diopters of cylinder. Nearly 20% of the aviators who wore corrective lenses exceeded the corrective limits of the goggles that they used. Further, pilots had no specific prescreening instruction. With the development of more sophisticated aviation optics. Three options exist: modify visual standards, allow contact lens wear, or design future systems to be compatible with spectacles.
随着美国陆军夜视镜（NVG）任务要求的出现，后备役部队开始使用第二代（AN/PVS - 5和AN/PVS - 5A）系统进行训练。这些系统禁止飞行员佩戴眼镜。某些系统经过一些改进后允许佩戴眼镜。然而，仍然存在至少5小时的白天滤光训练要求，在此期间必须佩戴带面罩和衬垫的完整NVG，且不能戴眼镜。NVG系统可矫正高达+2.00屈光度的远视和高达 - 6.00屈光度的近视，但仅能矫正±1.00屈光度的散光。对西南部后备役部队（美国陆军后备队和国民警卫队）的飞行员进行了一项调查，以确定NVG系统在年龄比现役部队飞行员更大的飞行员群体中相对不兼容的情况。所有医疗记录保管人都收到了问卷，飞行外科医生通过电话或实地访问对回复进行跟进。我们总共筛选了127份飞行员记录。飞行员的平均年龄为39.5岁；65.3%的人视力为20/20，是正视眼。在佩戴眼镜的人中，82.4%患有远视或近视，可通过NVG内置的光学调节进行矫正。另外17.6%的人视力超过了NVG内置的矫正系数，他们是柱镜度数大于2.00屈光度的散光患者。近20%佩戴矫正镜片的飞行员超出了他们所使用护目镜的矫正极限。此外，飞行员没有具体的预检指导。随着更先进航空光学设备的发展，存在三种选择：修改视力标准、允许佩戴隐形眼镜或设计未来系统以使其与眼镜兼容。
