Guangdong Eye Institute, Guangdong Academy of Medical Sciences, Guangzhou, China.
J Cataract Refract Surg. 2010 Mar;36(3):497-502. doi: 10.1016/j.jcrs.2009.07.054.
A 72-year-old man presented with high astigmatism (2.25 -5.0 x 45) induced by long-term rotation of a toric intraocular lens (IOL). Corneal astigmatism was 3.78 diopters (D). The corrected distance visual acuity (CDVA) was 20/32. Because of the risk of repositioning, a secondary toric IOL of -3.0/6.0 D especially designed for sulcus implantation was piggybacked through 3.5 mm sutureless clear-corneal incision with a cylindrical axis obliquely crossed with that of the primary IOL. Eight months postoperatively, the corneal astigmatism was 5.04 D. The CDVA was 20/25 with a refraction of 1.0 -2.5 x 70. No interlenticular opacification or significant rotation or decentration of the secondary toric IOL was observed. The refractive properties of this pseudophakic eye were analyzed using a mathematical approach. The calculated postoperative refraction was 0.84 -1.7 x 47. A piggyback toric IOL can be implanted in an obliquely crossed style that allows a secondary toric IOL to correct astigmatism induced by long-term toric IOL rotation.
一位 72 岁男性因长期旋转散光性人工晶状体（IOL）而导致高度散光（2.25-5.0x45）。角膜散光为 3.78 屈光度（D）。矫正远视力（CDVA）为 20/32。由于重新定位的风险，一款特别设计用于巩膜植入的 -3.0/6.0D 二次散光 IOL 通过 3.5mm 无缝线透明角膜切口，以与主 IOL 斜交的圆柱轴进行叠加。术后 8 个月，角膜散光为 5.04D。CDVA 为 20/25，屈光度为 1.0-2.5x70。未观察到晶状体间混浊或明显的二次散光 IOL 旋转或偏心。使用数学方法分析了这只人工晶状体眼的屈光特性。计算出的术后屈光度为 0.84-1.7x47。可以采用斜交式叠加散光性人工晶状体，使二次散光性人工晶状体能够矫正因长期散光性人工晶状体旋转而导致的散光。
