Wolffe M, Landry R J, Alpar J J
Moseley, Birmingham, UK.
Eye (Lond). 2007 Aug;21(8):1078-82. doi: 10.1038/sj.eye.6702539. Epub 2006 Aug 25.
To identify the source of unwanted glare images from a three-piece intraocular lens (IOL) implant following cataract surgery.
The IOL and posterior capsule were examined under mydriatic and nonmydriatic conditions using direct focal illumination from a slit lamp biomicroscope. Direct focal illumination was undertaken with both a narrow beam (0.1 mm in width) and small spot (0.1 mm in diameter) to identify the points at which the glare images were stimulated. While observing the location of the beam with the slit lamp biomicroscope, the patient indicated when the glare images were stimulated.
The nasal haptic insertion into the optic was identified as the source of temporal line images arising from lights such as headlamps from oncoming cars and street lamps. The adjacent edge of the IOL was also identified as the likely source of additional cob web-like light rays.
The haptic insertions in three-piece IOLs may, under certain conditions, interfere with light entering the pupil and produce extraneous images. Large mesopic pupils and decentred IOLs are conditions that increase the likelihood of unwanted glare images.
确定白内障手术后三件式人工晶状体（IOL）植入物产生不必要眩光图像的来源。
使用裂隙灯生物显微镜的直接焦点照明，在散瞳和不散瞳条件下检查IOL和后囊。采用窄光束（宽度0.1mm）和小光斑（直径0.1mm）进行直接焦点照明，以确定刺激眩光图像的点。在使用裂隙灯生物显微镜观察光束位置时，患者指出眩光图像受到刺激的时间。
鼻侧襻插入光学部被确定为来自迎面而来汽车的前照灯和路灯等光线产生颞侧线状图像的来源。IOL的相邻边缘也被确定为额外的蛛网状光线的可能来源。
在某些情况下，三件式IOL中的襻插入可能会干扰光线进入瞳孔并产生额外图像。大的中间视觉瞳孔和偏心的IOL会增加产生不必要眩光图像的可能性。
