Kotulak J C, Morse S E
Visual Sciences Branch, U.S. Army Aeromedical Research Laboratory, Fort Rucker, AL 36362-0577.
Aviat Space Environ Med. 1994 Apr;65(4):348-52.
Sixteen U.S. Army aviators, who were given training on focus adjustment technique with aviator night vision goggles (NVG), showed an improvement in visual acuity with focus adjustment compared to a fixed infinity focus control. The long-term effect of focus adjustment on vision was not measured; however, adjustment accuracy was found to be generally within acceptable limits based on computer modeling and available physiologic data. Fixed focus eyepieces that are set to a low minus power may partially compensate for instrument myopia, but they may not optimize visual acuity to the extent that adjustable focus eyepieces do. Eyepiece adjustment proficiency with present night vision devices can be improved through training that emphasizes focusing to the least possible minus dioptric power. Future night vision displays can minimize focus misadjustment by providing a tactile zero marking, a limited dioptric adjustment range, and a focusing knob capable of finer adjustment than is available with current NVG's.
16名接受过飞行员夜视镜（NVG）聚焦调整技术训练的美国陆军飞行员，与固定无限远聚焦控制相比，聚焦调整后视力有所提高。未测量聚焦调整对视力的长期影响；然而，根据计算机建模和现有生理数据，发现调整精度总体上在可接受范围内。设置为低负屈光度的固定聚焦目镜可能会部分补偿器械性近视，但它们可能无法像可调聚焦目镜那样将视力优化到相同程度。通过强调聚焦到尽可能低的负屈光度的训练，可以提高当前夜视设备的目镜调整熟练度。未来的夜视显示器可以通过提供触觉零标记、有限的屈光度调整范围以及比当前NVG更精细调整的聚焦旋钮，将聚焦调整不当降至最低。
