Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah 84132, USA.
J Cataract Refract Surg. 2012 Mar;38(3):470-4. doi: 10.1016/j.jcrs.2011.09.039. Epub 2011 Dec 24.
To understand some of the variable refractive changes that occur during routine cataract surgery that could affect the accuracy and effectiveness of intraoperative aberrometry as it relates to the postoperative refractive state.
John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
Comparative case series.
Phase 1 of this study assessed the cylinder induced by 2 eyelid speculums (open wire and closed wire) with corneal topographic images from participants without cataract. Phase 2 assessed the refractive change in cylinder, its axis, and the spherical equivalent (SE) in cataract patients within 1 hour of cataract surgery compared with 1 week after surgery. These measurements were taken using wavefront aberrometry, manual refraction, and corneal topography.
Phase 1 evaluated 99 corneal topographic images from 5 participants. The presence of a speculum induced erratic changes in cylinder and a statistically significant difference in axis when comparing the open-wire speculum and the closed-wire speculum (both P<.0001). In phase 2, which evaluated 10 patients, there was a significant change in the SE within 1 hour of cataract surgery compared with 1 week after surgery (P=.039).
Cataract surgery induced changes in cylinder, its axis, and the SE. This suggests that decisions based on intraoperative aberrometry may be inaccurate.
Dr. Olson has been a consultant to Abbott Medical Optics, Inc., Becton, Dickinson and Co., and Allergan, Inc., and has received grant support from Abbott Medical Optics, Inc. and Allergan, Inc. No author has a financial or proprietary interest in any material or method mentioned.
了解白内障手术过程中发生的一些可改变的折射变化，这些变化可能会影响术中像差测量的准确性和有效性，因为它与术后屈光状态有关。
美国犹他州盐湖城的犹他大学约翰 A. 莫兰眼科中心。
比较病例系列。
该研究的第一阶段评估了来自无白内障参与者的角膜地形图图像上的 2 个眼睑镜（开线和闭线）引起的柱镜。第二阶段评估了白内障患者在白内障手术后 1 小时内与术后 1 周内的柱镜、其轴位和等效球镜（SE）的屈光变化。这些测量值是通过波前像差、手动折射和角膜地形图获得的。
第一阶段评估了 5 名参与者的 99 张角膜地形图图像。当比较开线镜和闭线镜时，镜架的存在会引起柱镜的不规则变化，并且轴位存在统计学上的显著差异（均 P<.0001）。在第二阶段，评估了 10 名患者，与术后 1 周相比，白内障手术后 1 小时内 SE 有显著变化（P=.039）。
白内障手术引起了柱镜、其轴位和 SE 的变化。这表明基于术中像差的决策可能不准确。
Olson 博士曾担任 Abbott Medical Optics, Inc.、Becton, Dickinson and Co. 和 Allergan, Inc. 的顾问，并获得 Abbott Medical Optics, Inc. 和 Allergan, Inc. 的资助。没有作者在提到的任何材料或方法中有经济或所有权利益。
