Appearance of the human eye: optical contributions to the "limbal ring".
Appearance of the human eye: optical contributions to the "limbal ring".
复制标题
人眼的外观：光学对“角膜缘环”的贡献。
DOI：
10.1097/opx.0b013e3181b4f010
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Wyatt,HarryJ
中科院分区：
文献类型：
--
作者：
Shyu,BetsyP;Wyatt,HarryJ
目的：许多眼睛在利姆布斯处出现黑眼圈。目前的工作调查是否这个环可以部分地由光学特性的眼睛附近的利姆布斯。方法。10个人类受试者的眼睛被浸入水中，通过有科目佩戴充满盐水的护目镜，以评估角膜缘环的变化时，角膜/空气界面的功率在很大程度上消除。在空气中和水中对眼睛进行拍照，并对图像进行分析以确定角膜缘环的突出程度。角膜形状确定为相同的眼睛使用一个商业地形system.Results.Immersion在水中减少了突出的角膜缘环由1055%on average.Conclusions.The黑暗的角膜缘环有大量的光学元件在许多眼睛，虽然证据被发现在一些眼睛的解剖基础。环的可见性可能取决于不透明角膜的程度，这对角度宽度的临床估计有影响。
Purpose.Many eyes appear to have a dark ring at the limbus. The present work investigated whether this ring could be partly caused by optical properties of the eye near the limbus.Methods.The eyes of 10 human subjects were immersed in water, by having subjects wear goggles filled with saline, to assess the changes in the limbal ring when the power of the cornea/air interface was largely eliminated. Eyes were photographed in air and in water, and images were analyzed to determine the prominence of the limbal ring. Corneal shape was determined for the same eyes using a commercial topography system.Results.Immersion in water reduced the prominence of the limbal ring by∼ 55% on average.Conclusions.The dark limbal ring has a substantial optical component in many eyes, although evidence was found for an anatomical basis in some eyes. Visibility of the ring may depend on extent of non-transparent cornea, which has implications for clinical estimation of angle width.