Barrett G D
Lions Eye Institute, Perth, Western Australia.
J Cataract Refract Surg. 1994 Jan;20(1):18-25. doi: 10.1016/s0886-3350(13)80038-7.
A new hydrogel intraocular lens was designed to improve fixation and support. The lens, IOGEL model 2000S, has a 6.00 mm optic that merges via a crescentic flange into a terminal loop for an overall diameter of 12.00 mm. The haptics are more flexible than existing loops and the design of the lens is based on a concept of minimum loop rigidity; that is, a haptic that is rigid enough to support the weight of a lens in aqueous within the capsular bag is considered adequate for modern cataract surgery. I evaluated the lens design's safety and efficacy. Excluding patients with pre-existing macular degeneration, the corrected acuity of all patients at last follow-up was 20/40 or better in 100%, 20/30 or better in 95%, 20/25 to 20/20 or better in 85%, and 20/15 or better in 15%. The new haptic can accommodate compression of the capsular bag and allows early, reliable fixation. The centration of the lens was excellent early in the postoperative period and later after capsular fibrosis developed.
一种新型水凝胶人工晶状体旨在改善固定和支撑效果。该晶状体为IOGEL 2000S型号，其6.00毫米的光学部通过新月形凸缘与终端袢相连，总直径为12.00毫米。其袢比现有的袢更具柔韧性，并且晶状体的设计基于最小袢刚度的概念；也就是说，对于现代白内障手术而言，一个足够坚固以支撑晶状体在囊袋内房水中重量的袢被认为是合适的。我评估了该晶状体设计的安全性和有效性。排除已有黄斑变性的患者，所有患者在最后一次随访时的矫正视力，100%达到20/40或更好，95%达到20/30或更好，85%达到20/25至20/20或更好，15%达到20/15或更好。新型袢能够适应囊袋的压缩，并能实现早期、可靠的固定。晶状体的中心定位在术后早期以及囊膜纤维化发展后期均非常出色。
