在调节过程中晶状体直径是增大还是减小？人体调节研究：一种使用红外逆光视频摄影和像素单位测量的新技术。
Does the lens diameter increase or decrease during accommodation? Human accommodation studies: a new technique using infrared retro-illumination video photography and pixel unit measurements.
作者信息
Wilson R S
机构信息
Retinal Group, Ltd., Little Rock, AR 72205, USA.
出版信息
Trans Am Ophthalmol Soc. 1997;95:261-7; discussion 267-70.
PURPOSE
To describe a new technique for viewing and measuring the lens diameter during accommodation.
METHODS
The accommodative lens activity, in a young female carrier of ocular albinism, was evaluated using retro-illumination infrared video photography and pixel unit measurements.
RESULTS
Right and left lens diameter measurements were 498 pu and 501 pu, respectively, during natural accommodation. In pharmacologic non-accommodation (Tropicamide), the average lens diameter was 524 pu (range 518-528) while in accommodation (Pilocarpine), the average lens diameter was 485 pu (range 479-491).
CONCLUSIONS
Right and left lens measurements were essentially identical. All measurements were reliable, repeatable and extremely accurate. The lens diameter consistently reduced during accommodation and enlarged during non-accommodation. The theories, similar to Tscherning's, which imply that the lens diameter increases in accommodation, are clearly disproven.
目的
描述一种在调节过程中观察和测量晶状体直径的新技术。
方法
使用后照式红外视频摄影和像素单位测量法，对一名患有眼部白化病的年轻女性携带者的晶状体调节活动进行评估。
结果
在自然调节过程中，右眼和左眼的晶状体直径测量值分别为498像素单位和501像素单位。在药物性非调节状态（托吡卡胺）下，晶状体平均直径为524像素单位（范围为518 - 528），而在调节状态（毛果芸香碱）下，晶状体平均直径为485像素单位（范围为479 - 491）。
结论
左右眼晶状体测量值基本相同。所有测量结果可靠、可重复且极其准确。晶状体直径在调节过程中持续减小，在非调节过程中增大。那些与切尔宁理论相似、认为晶状体直径在调节时会增大的理论被明确证伪。
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