Vector Analysis of Corneal Astigmatism After Combined Femtosecond-Assisted Phacoemulsification and Arcuate Keratotomy

被引:73
作者
Chan, Tommy C. Y. [1 ,4 ]
Cheng, George P. M. [2 ]
Wang, Zheng [3 ]
Tham, Clement C. Y. [1 ,4 ]
Woo, Victor C. P. [2 ]
Jhanji, Vishal [1 ,4 ]
机构
[1] Hong Kong Eye Hosp, Kowloon, Hong Kong, Peoples R China
[2] Hong Kong Laser Eye Ctr, Hong Kong, Hong Kong, Peoples R China
[3] Sun Yat Sen Univ, Zhongshan Ophthalm Ctr, Guangzhou 510275, Guangdong, Peoples R China
[4] Chinese Univ Hong Kong, Dept Ophthalmol & Visual Sci, Hong Kong, Hong Kong, Peoples R China
关键词
CATARACT-SURGERY; LASER; PREVALENCE;
D O I
10.1016/j.ajo.2015.05.004
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
PURPOSE: To evaluate the outcomes of femtosecond-assisted arcuate keratotomy combined with cataract surgery in eyes with low to moderate corneal astigmatism. DESIGN: Retrospective, interventional case series. METHODS: This study included patients who underwent combined femtosecond-assisted phacoemulsification and arcuate keratotomy between March 2013 and August 2013. Keratometric astigmatism was evaluated before and 2 months after the surgery. Vector analysis of the astigmatic changes was performed using the Alpins method. RESULTS: Overall, 54 eyes of 54 patients (18 male and 36 female; mean age, 68.8 +/- 11.4 years) were included. The mean preoperative (target-induced astigmatism) and postoperative astigmatism was 1.33 +/- 0.57 diopters (D) and 0.87 +/- 0.56 D, respectively (P < .001). The magnitude of error (difference between surgically induced and target-induced astigmatism) (-0.13 +/- 0.68 D), as well as the correction index (ratio of surgically induced and target-induced astigmatism) (0.86 +/- 0.52), demonstrated slight undercorrection. The angle of error was very close to 0, indicating no significant systematic error of misaligned treatment. However, the absolute angle of error showed a less favorable range (17.5 +/- 19.2 degrees), suggesting variable factors such as healing or alignment at an individual level. There were no intraoperative or postoperative complications. CONCLUSIONS: Combined phacoemulsification with arcuate keratotomy using femtosecond laser appears to be a relatively easy and safe means for management of low to moderate corneal astigmatism in cataract surgery candidates. Misalignment at an individual level can reduce its effectiveness. This issue remains to be elucidated in future studies. ((C) 2015 by Elsevier Inc. All rights reserved.)
引用
收藏
页码:250 / 255
页数:6
相关论文
共 26 条
[1]   Femtosecond laser-assisted astigmatic keratotomy in naturally occurring high astigmatism [J].
Abbey, A. ;
Ide, T. ;
Kymionis, G. D. ;
Yoo, S. H. .
BRITISH JOURNAL OF OPHTHALMOLOGY, 2009, 93 (12) :1566-1569
[2]   Astigmatism analysis by the Alpins method [J].
Alpins, N .
JOURNAL OF CATARACT AND REFRACTIVE SURGERY, 2001, 27 (01) :31-49
[3]   Vector analysis of astigmatism changes by flattening, steepening, and torque [J].
Alpins, NA .
JOURNAL OF CATARACT AND REFRACTIVE SURGERY, 1997, 23 (10) :1503-1514
[4]   Correction of astigmatism at the time of cataract surgery [J].
Amesbury, Eric C. ;
Miller, Kevin M. .
CURRENT OPINION IN OPHTHALMOLOGY, 2009, 20 (01) :19-24
[5]   IntraLase-Enabled Astigmatic Keratotomy for Postkeratoplasty Astigmatism [J].
Bahar, Irit ;
Levinger, Eliya ;
Kaiserman, Igor ;
Sansanayudh, Wiwan ;
Rootman, David S. .
AMERICAN JOURNAL OF OPHTHALMOLOGY, 2008, 146 (06) :897-904
[6]  
Beiko G., 2008, MASTERING REFRACTIVE, P88
[7]   Prevalence of corneal astigmatism before cataract surgery [J].
Ferrer-Blasco, Teresa ;
Montes-Mico, Robert ;
Peixoto-de-Matos, Sofia C. ;
Gonzalez-Meijome, Jose M. ;
Cervino, Alejandro .
JOURNAL OF CATARACT AND REFRACTIVE SURGERY, 2009, 35 (01) :70-75
[8]   Arcuate relaxing incisions guided by corneal topography for postkeratoplasty astigmatism: Vector and topographic analysis [J].
Geggel, Harry S. .
CORNEA, 2006, 25 (05) :545-557
[9]   Analysis of corneal astigmatism in cataract surgery candidates at a teaching hospital in Shanghai, China [J].
Guan, Zhao ;
Yuan, Fei ;
Yuan, Yuan-Zhi ;
Niu, Wei-Ran .
JOURNAL OF CATARACT AND REFRACTIVE SURGERY, 2012, 38 (11) :1970-1977
[10]   Correction of moderate corneal astigmatism during cataract surgery: Toric intraocular lens versus peripheral corneal relaxing incisions [J].
Hirnschall, Nino ;
Gangwani, Vinod ;
Crnej, Alja ;
Koshy, John ;
Maurino, Vincenzo ;
Findl, Oliver .
JOURNAL OF CATARACT AND REFRACTIVE SURGERY, 2014, 40 (03) :354-361