眼内散射光的临床意义及测量方法的研究进展

眼内散射光是由于光线在人眼内发生散射，降低了物像在视网膜的对比度，从而影响了视觉质量的物理现象。眼内散射光是失能性眩光的主要原因，可以引起各种不适症状。正常人眼的散射光由角膜、虹膜、巩膜、晶状体及视网膜组成，当这些屈光介质出现混浊或病理变化时，都可能引起相应散射光的增加。虽然目前存在多种测量手段及测量参数，但是仍然缺乏对散射光测量过程的统一化及散射参数定义的标准化，需要进行更为深入和广泛的研究。就眼内散射光的基本概念、来源、临床意义以及各种测量方法的研究进展进行综述。

Measurement of intraocular stray light and its clinical significance

Stray light is a physical phenomenon that degrades visual quality when light scattering occurs in the human eye. It is a main cause of the disabling glare. Stray light originates in cornea, iris, sclera, lens and retina, and these ocular tissues contribute to the total amount of stray light in a normal eye. The light scattering intensity increases when the transparency of any optical element mentioned above reduces. Stray light can be measured by several different methods, but the measurements still lacks a standardized procedure and outcome. Further clinical study is necessary to quantify and standardize the measuring method of stray light. This article aims to introduce the concept,source and clinical significance of stray light, and to provide its advanced measurement techniques and methods.