From the Department of Ophthalmology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
From the Department of Ophthalmology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
J Cataract Refract Surg. 2014 Feb;40(2):232-8. doi: 10.1016/j.jcrs.2013.11.015. Epub 2013 Dec 13.
To analyze the influence of demographic and ocular factors on ocular residual astigmatism (ORA) in myopic laser in situ keratomileusis (LASIK).
University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Retrospective cross-sectional data analysis.
Eyes of consecutive myopic patients scheduled for LASIK were studied to evaluate the influence on preexisting ORA of age, sex, ocular dominance, subjective cylinder and topographic astigmatism, subjective sphere, and mesopic pupil size. The ORA was determined using Alpins vector analysis. Two subgroups, defined by the ratio of ORA to preoperative refractive cylinder (R), were formed: ORA:R ≥ 1.0 and ORA:R <1.0).
The study comprised 2991 eyes (2991 patients). The mean ORA was 0.75 diopter (D) ± 0.39 (SD) (range 0.00 to 2.00 D); 1372 (46%) eyes had ORA of 1.00 D or more. Ordinary least square estimations and odds ratios showed that subjective sphere, male sex, and dominant eye were negative predictors of the degree of preoperative ORA, while increasing age and larger mesopic pupils did not indicate ORA orientation. With-the-rule astigmatism meridian was more likely in eyes with low ORA, while oblique and against-the-rule meridians were related to high ORA.
The preoperative assessment of refractive surgery candidates should consider the interaction between topographic, refractive, and ORA because corneal refractive surgery is more successful in eyes in which the cylinder mainly originates from the anterior cornea. The current data can help identify patients at high risk for having a significant difference between subjective cylinder and topographic astigmatism.
No author has a financial or proprietary interest in any material or method mentioned.
分析人口统计学和眼部因素对近视激光原位角膜磨镶术（LASIK）后眼内残余散光（ORA）的影响。
德国汉堡大学医学中心。
回顾性横断面数据分析。
对连续接受 LASIK 治疗的近视患者的眼部进行研究，以评估年龄、性别、主导眼、主观散光和角膜散光、主观球镜和中光瞳孔大小对术前 ORA 的影响。ORA 采用 Alpins 向量分析法确定。根据 ORA 与术前屈光性散光（R）的比值（ORA:R）将眼分为两个亚组：ORA:R≥1.0 和 ORA:R<1.0）。
本研究共纳入 2991 只眼（2991 例患者）。平均 ORA 为 0.75 屈光度（D）±0.39（SD）（范围 0.00 至 2.00 D）；1372 只眼（46%）的 ORA 为 1.00 D 或更高。普通最小二乘估计和优势比显示，主观球镜、男性和主导眼是术前 ORA 程度的负预测因子，而年龄增加和中光瞳孔增大并不提示 ORA 方向。低 ORA 眼更容易出现顺规散光子午线，而斜轴和逆规散光子午线与高 ORA 有关。
屈光手术候选者的术前评估应考虑到地形、屈光和 ORA 之间的相互作用，因为角膜屈光手术在以角膜前表面散光为主的眼内更为成功。目前的数据可以帮助识别出那些主观散光和角膜散光之间存在显著差异的高风险患者。
没有作者在提到的任何材料或方法中拥有经济或所有权利益。
