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目的 探讨飞行人员快速暗适应时间(FDAT)、视网膜光感绝对阈值(AT)在夜视功能评定中的实用价值。方法 用G/W暗适应计和夜间视觉检查仪对43名飞行人员分别测定AT及FDAT值,将FDAT值分成≤20s,50～60s,>60s3组,对AT及FDAT进行F检验。结果 ①FDAT值愈短,AT值亦相对愈低,两者间具有显著的相关性。②>60s组与50～60s组及≤20s组间暗适应后7～15min的AT值存在显著性差异。结论 ①FDAT≤1min时,AT及FDAT所反映的夜视功能一致,故单项FDAT足以评定该功能。②当FDAT>1min时,有杆体细胞“功能性延迟”的可能,应以AT值作为界定夜视能力的依据。
Objective To explore the practical value of rapid dark adaptation time (FDAT) and absolute retinal sensory threshold (AT) in the assessment of night vision function of pilots. Methods AT and FDAT values were measured on 43 pilots using G / W darkness-adaptive and night-vision visualizers. FDAT values were divided into groups of ≤20s, 50 ~ 60s, and> 60s3. F test was performed on AT and FDAT. Results ① The shorter the value of FDAT, the lower the AT value, with a significant correlation between them. There was a significant difference in the AT values of 7 ~ 15min after dark adaptation between 60s group and 50 ~ 60s group and ≤20s group. Conclusions ① At the time of FDAT≤1min, the night vision features reflected by AT and FDAT are consistent, so the single FDAT is enough to evaluate this function. ② When FDAT> 1min, rod body cells “functional delay” may be based on AT value as the basis for the definition of night vision.