Guo Tao, Gao Peng, Fang Li, Guo Li, Fan Yuchen, Liu Changgen
Department of Ophthalmology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai 200011, P.R. China.
Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai 200011, P.R. China.
Exp Ther Med. 2018 Jun;15(6):5288-5294. doi: 10.3892/etm.2018.6102. Epub 2018 Apr 25.
The present prospective clinical observational study aimed to evaluate the efficacy of Toric intraocular lenses (IOL) to achieve rotational stability and astigmatism correction in eyes with high myopia. A total of 27 consecutive cataract patients (39 eyes) with pre-existing corneal astigmatism (1.5-3.5 D) were divided into two groups according to their refractive status: One group of 18 eyes with high myopia -(12.5-6.0 D) and another group consisting of 21 eyes with emmetropia or low myopia (-3.0-0.0 D). All eyes underwent cataract phacoemulsification surgeries by the same surgeon, with the implantation of an AcrySof Toric IOL at the pre-designed degree. Uncorrected visual acuity, best corrected visual acuity and phoropter examination results were recorded at the 1st day, 1st week, 1st month and 3rd month after the surgery. By analyzing digital images from slim-lamp photography with a self-designed software, the rotational stability was observed. The contrast sensitivity was also measured. No significant difference in the baseline and post-operative residual astigmatism was identified between the two groups (P>0.05). In addition, no significant difference in the degree of rotation was observed between the two groups. All patients had significantly improved visual quality after the surgery (P<0.05). In conclusion, the present study observed an equal astigmatism-correction efficiency and rotational stability in the two groups. A second auxiliary spot-penetrating incision, removal of visco-elastic substances and tight adherence of the IOL to the posterior capsular membrane are essential for a successful surgery.
本前瞻性临床观察研究旨在评估复曲面人工晶状体（IOL）在高度近视眼中实现旋转稳定性和散光矫正的效果。共有27例连续的白内障患者（39只眼），其术前存在角膜散光（1.5 - 3.5 D），根据屈光状态分为两组：一组18只眼为高度近视（-12.5 - 6.0 D），另一组由21只眼的正视或低度近视（-3.0 - 0.0 D）组成。所有眼睛均由同一位外科医生进行白内障超声乳化手术，并按预先设计的度数植入AcrySof复曲面IOL。在术后第1天、第1周、第1个月和第3个月记录未矫正视力、最佳矫正视力和综合验光仪检查结果。通过使用自行设计的软件分析裂隙灯摄影的数字图像，观察旋转稳定性。还测量了对比敏感度。两组之间在基线和术后残余散光方面未发现显著差异（P>0.05）。此外，两组之间在旋转程度上也未观察到显著差异。所有患者术后视觉质量均有显著改善（P<0.05）。总之，本研究观察到两组在散光矫正效率和旋转稳定性方面相当。第二个辅助穿刺切口、去除粘弹性物质以及IOL与后囊膜的紧密附着对于成功手术至关重要。
