J Refract Surg. 2021 Jun;37(6):398-402. doi: 10.3928/1081597X-20210310-01. Epub 2021 Jun 1.
To determine and compare the origin of the external surface reflections produced by commonly used intraocular lenses (IOLs).
The specular reflection taking place at the anterior surface of eight types of IOLs (IOL power = 22.00 diopters [D]) with different refractive indices (RIs), optical design, and ultraviolet and blue light-filtering function were measured. The experimental set-up included a laser beam light source (3.5 mW, 532 nm) and a saline-filled model eye containing the IOL to be examined. External surface reflections were measured using a power meter, and the IOL surface reflectance (%) was compared among the eight IOLs investigated.
External reflections from the anterior surface of the studied implants increased as the RI of the IOL material increased. The IOL models composed of high RI material (RI = 1.56 ± 0.02) were found to have a more than threefold higher external surface reflections compared to those with low RI (RI = 1.45 ± 0.02). Ultraviolet or blue light-filtering functions showed no significant correlation with the external reflectance.
IOLs with a high RI are associated with external surface reflections that are more than threefold higher than those with lower RI. The "cat's eye" phenomenon seen in pseudophakic eyes by an outside observer strongly depends on the RI, but is independent of the filter incorporated in the IOL. .
确定并比较常用人工晶状体（IOL）产生的外表面反射的来源。
测量了具有不同折射率（RI）、光学设计以及紫外线和蓝光过滤功能的八种 IOL（IOL 功率=22.00 屈光度[D]）前表面发生的镜面反射。实验装置包括激光束光源（3.5 mW，532nm）和充满生理盐水的模型眼，其中包含要检查的 IOL。使用功率计测量外表面反射，并比较了所研究的八种 IOL 之间的 IOL 表面反射率（%）。
研究植入物前表面的外部反射随着 IOL 材料 RI 的增加而增加。由高 RI 材料（RI=1.56±0.02）制成的 IOL 模型的外部表面反射率比 RI 较低的模型（RI=1.45±0.02）高三倍以上。紫外线或蓝光过滤功能与外部反射率之间没有显著相关性。
RI 较高的 IOL 与外部表面反射率较高有关，比 RI 较低的 IOL 高三倍以上。外部观察者在白内障眼中看到的“猫眼”现象强烈依赖于 RI，但与 IOL 中包含的滤光片无关。
