Change in the accommodative force on the lens of the human eye with age
Change in the accommodative force on the lens of the human eye with age
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DOI：
10.1016/j.visres.2007.10.017
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发表时间：
2008-01-01
期刊：
影响因子：
1.8
通讯作者：
Heethaar, R. M.
中科院分区：
文献类型：
--
作者：
Hermans, E. A.;Dubbelman, M.;Heethaar, R. M.
该研究的目的是确定透镜上的屈光力的年龄依赖性，以明确老视的原因是由于晶状体还是晶状体外变化。构建了11岁、29岁和45岁人眼透镜的有限元模型，以代表完全调节状态。随后，计算将透镜模制到其未调节状态所需的力。透镜上的力似乎随着老化而保持不变，仅略微增加至约0.06 N的值。总之，晶状体外睫状体传递的净力的保存表明老视的原因必须归因于晶状体的变化。(C)2007爱思唯尔有限公司保留所有权利。
The aim of the study was to determine the age-dependence of the accommodative force on the lens in order to make it clear whether the causes of presbyopia are due to lenticular or extralenticular changes. A finite element model of the lens of an 11-, 29- and 45-year-old human eye was constructed to represent the fully accommodated state. Subsequently, the force that was needed to mould the lens into its unaccommodated state was calculated. The force on the lens appeared to be preserved with age, with only a slight increase to a value of approximately 0.06 N. In conclusion, the preservation of the net force delivered by the extralenticular ciliary body indicates that the causes of presbyopia must be ascribed to lenticular changes. (C) 2007 Elsevier Ltd. All rights reserved.