Rawer Rainer, Stork Wilhelm, Spraul Christoph W, Lingenfelder Christian
Institut für Technik der Informationsverarbeitung, Universität Karlsruhe, Karlsruhe, Berlin, Germany.
J Cataract Refract Surg. 2005 Aug;31(8):1618-31. doi: 10.1016/j.jcrs.2005.01.033.
To compare the imaging quality of several commercially available intraocular lenses (IOLs) using the modulation transfer function (MTF) method according to the requirements of the International Standard European Industrial Norm/International Organization for Standardization 11979.
Universitat für Technik der Informationsverarbeitung, Universität Karlsruhe, Karlsruhe and Universitäts Augenklinik, Ulm, Ulm, Germany.
Two refractive powers (+13 diopter [D] and +26 D) of each IOL type were tested. The imaging quality of all tested IOLs was measured before the injection test and in 5-minute intervals after the injection for 40 minutes. The measurement data were analyzed according to 2 quality criteria, Strehl ratio and the ISO condition. For analysis of the type of optical design, SEM images of the central cross section were taken of each IOL. Basic terms in optics such as MTF, resolution, and optical aberration are introduced, and their relevance for ophthalmology is discussed in detail. This paper represents an extensive study comparing the imaging quality of various IOLs including the comparison of measurements before and after injection through a cartridge as used for state-of-the-art implantation techniques. All measurements were performed using an MTF measurement system using a 546 nm optimized laser source and an effective aperture of 3.0 mm on the IOL according to ISO standard. An ISO standard eye model using an artificial cornea (spherical design) and a watery solution to simulate in vivo conditions was used.
All IOLs apart from 1 +26 D lens complied with ISO standard requirements. However, the imaging quality varied up to 49% depending on the optical design and the manufacturing quality.
When the methods and materials recommended by the manufacturer for IOL injection through a cartridge were used, no long-term effect on the imaging quality of the IOLs was observed. However, the basic imaging quality of different designs and different manufacturers varied significantly (up to 50% at +26 D) IOLs and should be considered when choosing an IOL.
根据欧洲国际标准/国际标准化组织11979的要求，使用调制传递函数（MTF）方法比较几种市售人工晶状体（IOL）的成像质量。
德国卡尔斯鲁厄的卡尔斯鲁厄大学技术与信息处理大学以及乌尔姆的乌尔姆大学眼科诊所。
对每种IOL类型的两种屈光力（+13屈光度[D]和+26 D）进行测试。在注射测试前以及注射后每隔5分钟测量40分钟，对所有测试的IOL的成像质量进行测量。根据斯特列尔比和ISO条件这两个质量标准对测量数据进行分析。为了分析光学设计类型，对每个IOL的中央横截面拍摄了扫描电子显微镜（SEM）图像。介绍了光学中的基本术语，如MTF、分辨率和光学像差，并详细讨论了它们在眼科中的相关性。本文是一项广泛的研究，比较了各种IOL的成像质量，包括通过用于先进植入技术的药筒进行注射前后的测量比较。所有测量均使用MTF测量系统，根据ISO标准，使用546 nm优化激光源，在IOL上的有效孔径为3.0 mm。使用了一种ISO标准眼模型，该模型使用人工角膜（球面设计）和水溶液来模拟体内条件。
除了一个+26 D的晶状体外，所有IOL均符合ISO标准要求。然而，根据光学设计和制造质量的不同，成像质量的变化高达49%。
当使用制造商推荐的通过药筒注射IOL的方法和材料时，未观察到对IOL成像质量的长期影响。然而，不同设计和不同制造商的IOL的基本成像质量差异显著（+26 D时高达50%），在选择IOL时应予以考虑。
