Mohammadi Mehran, Naderan Mohammad, Pahlevani Rozhin, Jahanrad Ali
AJA University of Medical Sciences, Fatemi ave, 1483659342, Tehran, Iran.
School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Int Ophthalmol. 2016 Dec;36(6):807-817. doi: 10.1007/s10792-016-0201-z. Epub 2016 Feb 24.
The purpose of this study was to describe and analyze the prevalence and pattern of corneal astigmatism in cataract surgery candidates. In a prospective cross-sectional study, preoperative demographics, and keratometric and refractive values of cataract surgery candidates were collected from January 2013 to December 2014. Axial length (AL) and flat and steep keratometry measurements were optically measured by a partial coherence interferometry device (IOLMaster). This study consisted of 2156 eyes of 1317 patients with a mean age of 64.92 ± 11.48 (SD) (30-88 years). The mean of AL was 23.33 ± 1.37 mm, and the mean of corneal astigmatism was 1.12 ± 1.10 diopter (D) (range 0.0-7.00), in all patients. Furthermore, the mean of flat and steep keratometry were 43.70 ± 1.70 and 44.83 ± 1.79 D, respectively. Corneal astigmatism was 1.50 D or less in 1590 eyes (73.7 %), more than 1.50 D in 566 eyes (26.2 %), 3.00 D or more in 161 eyes (7.4 %), WTR in 796 eyes (36.9 %), ATR in 1010 eyes (46.8 %), and oblique in 350 eyes (16.2 %). ATR astigmatism axis significantly increased with the increase in age. Corneal astigmatism of most cataract surgery candidates fell between 0.50 and 1.50 D. The results of our study however is confined to our demographics might provide useful data for cataract patients, surgeons, and intraocular lens manufacturers for different purposes.
本研究的目的是描述和分析白内障手术候选者角膜散光的患病率及模式。在一项前瞻性横断面研究中，收集了2013年1月至2014年12月期间白内障手术候选者的术前人口统计学数据以及角膜曲率和屈光值。眼轴长度（AL）以及平坦和陡峭角膜曲率测量值通过部分相干干涉测量设备（IOLMaster）进行光学测量。本研究纳入了1317例患者的2156只眼，平均年龄为64.92±11.48（标准差）（30 - 88岁）。所有患者的平均AL为23.33±1.37mm，平均角膜散光为1.12±1.10屈光度（D）（范围0.0 - 7.00）。此外，平坦和陡峭角膜曲率的平均值分别为43.70±1.70D和44.83±1.79D。1590只眼（73.7%）的角膜散光为1.50D或更低，566只眼（26.2%）的角膜散光超过1.50D，161只眼（7.4%）的角膜散光为3.00D或更高，796只眼（36.9%）为顺规散光，1010只眼（46.8%）为逆规散光，350只眼（16.2%）为斜轴散光。逆规散光轴随年龄增长显著增加。大多数白内障手术候选者的角膜散光在0.50D至1.50D之间。然而，我们的研究结果仅限于我们的人口统计学数据，可能会为白内障患者、外科医生和人工晶状体制造商提供不同用途的有用数据。
