Fukuda T, Kanada K, Saito S
NHK Science and Technical Research Laboratories, Tokyo, Japan.
Ergonomics. 1990 Jun;33(6):811-31. doi: 10.1080/00140139008927187.
This study is intended to make clear the relationships between a number of external conditions (target luminance, size, etc.), dynamic responsiveness of the lens accommodation, and microfluctuation. Further, the effects of ageing and the difference between monocular and binocular observations are examined. These studies established that age factors have a large bearing on the ability of the lens to focus on an object, as well as affecting such abilities as the responsiveness of the lens accommodation, amplitude of lens accommodation response, microfluctuation, and contraction and relaxation time. Of these accommodation functions, such factors as contraction and relaxation time clearly reflect the ease of seeing an object. Clear relationships between the amount of diopter and the ease of seeing an object were also observed. Further, it was established that a binocular observation is more responsive (velocity of contraction) than a monocular one. As to the microfluctuation, on the other hand, clear effects of age on its spectrum distribution were recognized but no definite correlations concerning the ease of seeing an object were observed.
本研究旨在明确一些外部条件（目标亮度、大小等）、晶状体调节的动态响应性与微波动之间的关系。此外，还研究了衰老的影响以及单眼和双眼观察之间的差异。这些研究表明，年龄因素对晶状体聚焦于物体的能力有很大影响，同时也影响晶状体调节的响应性、晶状体调节反应的幅度、微波动以及收缩和松弛时间等能力。在这些调节功能中，收缩和松弛时间等因素清楚地反映了看清物体的难易程度。还观察到屈光度与看清物体的难易程度之间存在明显关系。此外，已证实双眼观察比单眼观察更具响应性（收缩速度）。另一方面，关于微波动，虽然认识到年龄对其频谱分布有明显影响，但未观察到与看清物体的难易程度有明确的相关性。
