Department of Ophthalmology, Rudolf-Virchow-Klinikum Glauchau, Virchowstraße 18, 08371 Glauchau, Germany.
J Cataract Refract Surg. 2012 Sep;38(9):1650-6. doi: 10.1016/j.jcrs.2012.03.039. Epub 2012 Jul 20.
To compare the surface reflections in a pseudophakic model eye with and without a monofocal additional refractive intraocular lens (add-on IOL).
Department of Ophthalmology, Rudolf-Virchow-Klinikum Glauchau, Glauchau, and Experimental Ophthalmology, Saarland University, Homburg, Germany.
Experimental study.
The Liou and Brennan model eye was used to determine the retinal surface reflections in a pseudophakic model eye with and without an add-on IOL. The crystalline lens of the model eye was replaced by (1) a standard posterior chamber IOL (PC IOL) with a refractive power of 22.0 diopters (D) and (2) a PC IOL and an add-on IOL with refractive powers of 19.0 D and 2.5 D, respectively. To theoretically estimate the impact of the reflected images to visual impression, the signal-to-noise ratio (SNR) was calculated under 2 conditions: without and with straylight and double reflection effects.
Compared with the pseudophakic model eye without an add-on IOL, the pseudophakic model eye with an add-on IOL showed no relevant differences in the SNR under both conditions.
Findings indicate that implantation of monofocal add-on IOLs will not induce relevant additional disturbing glare compared with conventional pseudophakia.
比较有和无单焦点附加折射型人工晶状体（附加 IOL）的人工晶状体眼的表面反射。
德国格劳豪的鲁道夫-维乔克临床医院眼科和萨尔兰大学实验眼科。
实验研究。
使用 Liou 和 Brennan 模型眼来确定有和无附加 IOL 的人工晶状体眼中的视网膜表面反射。模型眼中的晶状体被（1）屈光力为 22.0 屈光度（D）的标准后房人工晶状体（PC IOL）和（2）屈光力分别为 19.0 D 和 2.5 D 的 PC IOL 和附加 IOL 取代。为了从理论上估计反射图像对视觉印象的影响，在 2 种条件下计算了信噪比（SNR）：无杂散光和双反射效应，以及有杂散光和双反射效应。
与无附加 IOL 的人工晶状体眼相比，有附加 IOL 的人工晶状体眼在这两种情况下的 SNR 均无明显差异。
研究结果表明，与传统的人工晶状体相比，植入单焦点附加 IOL 不会引起明显的额外眩光干扰。
