Department of Ophthalmology, Fuzhou the Second Hospital, Fuzhou, Fujian, China.
J Cataract Refract Surg. 2012 Nov;38(11):1970-7. doi: 10.1016/j.jcrs.2012.07.025.
To describe and quantify the pattern of corneal astigmatism in cataract surgery candidates and to provide information for cataract surgeons and intraocular lens (IOL) manufacturers.
Zhongshan Hospital, Fudan University, Shanghai, China.
Cross-sectional study.
The datasets of cataract surgery candidates acquired between November 1, 2009, and November 30, 2011, were collected and analyzed. Keratometry values were optically measured by partial coherence interferometry (IOLMaster) before cataract extraction. Spearman rank correlation coefficients were used to estimate bivariate correlations. The power vector method, J(0) and J(45) values, and linear regression models were used to assess the association between age and astigmatism.
The study evaluated the keratometry values in 1430 eyes (827 patients) with a median age of 75 years (range 16 to 98 years). The corneal astigmatism was 1.00 diopter (D) or higher in 45.45% of eyes. The magnitude of corneal astigmatism was positively correlated with age (ρ = 0.126, P = .000). A trend toward increasing against-the-rule astigmatism with age was found by linear regression models; the per-year increase in age was associated with a J(0) decrease of 0.016 D in right eyes and 0.018 D in left eyes (both P = .000). No association was found between age and J(45).
Most eyes having corneal astigmatism of 1.00 D or greater could be covered by the range of the cylindrical power of the toric IOLs available on the market. Against-the-rule corneal astigmatism of relatively younger cataract surgery candidates should be managed more aggressively.
No author has a financial or proprietary interest in any material or method mentioned.
描述和量化白内障手术患者的角膜散光模式，并为白内障手术医生和人工晶状体（IOL）制造商提供信息。
中国上海复旦大学中山医院。
横断面研究。
收集并分析了 2009 年 11 月 1 日至 2011 年 11 月 30 日期间白内障手术患者的数据集。在白内障摘除术前，通过部分相干干涉测量法（IOLMaster）对角膜曲率值进行光学测量。使用 Spearman 秩相关系数来估计双变量相关性。使用功率向量法、J（0）和 J（45）值以及线性回归模型来评估年龄与散光之间的关系。
该研究评估了 1430 只眼（827 例患者）的角膜曲率值，这些患者的中位年龄为 75 岁（范围 16 至 98 岁）。45.45%的眼存在 1.00 屈光度（D）或更高的角膜散光。角膜散光的大小与年龄呈正相关（ρ=0.126，P=0.000）。线性回归模型显示，随着年龄的增长，逆规散光呈增加趋势；右眼每增加 1 岁，J（0）减少 0.016 D，左眼 J（0）减少 0.018 D（均 P=0.000）。年龄与 J（45）之间没有关联。
市场上可提供的散光型人工晶状体的圆柱镜度数范围足以覆盖大多数角膜散光值为 1.00 D 或更高的患者。对于相对年轻的白内障手术患者的逆规角膜散光，应更积极地进行管理。
没有作者在文中提到的任何材料或方法中有经济或所有权利益。
