医学
屈光度
散光
眼科
人工晶状体
角膜地形图
视力
验光服务
白内障手术
超声乳化术
光学
物理
作者
Nino Hirnschall,Vinod Gangwani,Alja Črnej,John Koshy,Vincenzo Maurino,Oliver Findl
出处
期刊:Journal of Cataract and Refractive Surgery
[Ovid Technologies (Wolters Kluwer)]
日期:2014-03-01
卷期号:40 (3): 354-361
被引量:74
标识
DOI:10.1016/j.jcrs.2013.08.049
摘要
To compare the astigmatism-reducing effect of a toric intraocular lens (IOL) and peripheral corneal relaxing incisions (PCRIs).Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom.Prospective masked bilateral randomized study.Cataract patients with a preoperative corneal astigmatism of 1.0 to 2.5 diopters (D) were included. All patients received a toric IOL in 1 eye and a nontoric IOL plus a PCRI in the other eye. Postoperative follow-up was at 1 hour, 1 month, and 6 months. The uncorrected distance visual acuity, corrected distance visual acuity, autorefraction (Topcon RM-8800), and subjective refraction were recorded. The IOL axis was assessed using retroillumination photographs.The study enrolled 60 eyes of 30 patients. The mean astigmatism vector reduction was 1.74 D ± 0.64 (SD) in the toric IOL group and 1.27 ± 0.76 D in the PCRI group; the difference was statistically significant (P=.042). The mean absolute rotation of the toric IOL was 2.5 ± 1.8 degrees (maximum 6.3 degrees) in the first 6 postoperative months. Astigmatism increased in the PCRI group between the 1-month and 6-month follow-up (mean 0.38 ± 0.27 D; maximum 1.00 D) (P<.001).Toric IOLs and PCRIs both reduced astigmatism; however, toric IOLs reduced astigmatism to a higher extent and they were more predictable.
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