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目的观察在中间视觉状态下,海军飞行学员分辨不同对比度视标的细节能力。方法使用多功能夜间视觉检查仪,测量110名常规视力大于国际标准对数视力5.0的海军飞行学员中间视觉状态下100%、80%、60%、40%和20%对比度的对比视力。结果本组海军飞行学员中间视觉100%、80%、60%、40%和20%对比度下的对比视力分别为4.78、4.77、4.76、4.71、4.68。对比视力达到4.8的百分率分别为90%、86%、76%、41%和39%。结论本组海军飞行学员中间视觉的对比视力随着对比度的降低而下降,达到4.8的百分率也随着对比度的降低而下降。
Objectives To observe the detailed ability of naval pilots to distinguish different contrast targets in the intermediate visual state. Methods The visual acuity of 100%, 80%, 60%, 40%, and 20% of the mid-vision states of naval pilots with a normal visual acuity of more than the international standard logarithm of 5.0 was measured using a multi-functional nighttime vision tester. Results The contrast visual acuity of the naval flight participants at the contrast of 100%, 80%, 60%, 40% and 20% contrast was 4.78, 4.77, 4.76, 4.71 and 4.68 respectively. The percentages of visual acuity up to 4.8 were 90%, 86%, 76%, 41% and 39%, respectively. CONCLUSIONS The contrast vision of intermediate vision among naval pilots in this group decreased with decreasing contrast, and the percentage reaching 4.8 also decreased as the contrast decreased.