Hashemian Seyed Javad, Hashemian Seyed Mahyar, Karimian Farid, Hadavandkhani Ali, Jafari Mohammad Ebrahim, Hashemian Mahsa Sadat, Hadi Yasaman, Semnani Fatemeh Nadjafi
Eye Research Center, Five Senses Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
J Curr Ophthalmol. 2022 Apr 16;34(1):56-59. doi: 10.4103/joco.joco_33_21. eCollection 2022 Jan-Mar.
To analyze the biometric values and the prevalence of corneal astigmatism in cataract surgery candidates.
This is a prospective study. Ocular biometric values and corneal keratometric astigmatism were measured by optical low-coherence reflectometry (Lenstar LS 900) before surgery in patients who were candidates for cataract extraction surgery. Descriptive measurements of biometric dimensions and keratometric cylinder data and their correlations with sex and age were evaluated.
Ocular biometric and keratometric values from 2084 eyes of 2084 patients (mean age 66.43, range 19-95 years) were analyzed. The mean values were as follows: corneal astigmatism 0.89 diopter (D), mean corneal keratometry 44.29 D, central corneal thickness 534 μ, internal anterior chamber depth (ACD) 3.11 mm, lens thickness 4.50 mm, and axial length 23.35 mm. Corneal astigmatism was <1.25 D in 1660 (79.5%) of eyes. Astigmatism was with-the-rule in 976 (46.8%) of eyes, against-the-rule (ATR) in 702 (33.7%), and oblique in 406 (19.5%). Analysis of corneal astigmatism revealed a change toward "ATR" with age which was not statistically significant. The ACD was correlated with age. The amount of corneal astigmatism had no correlation with age and sex.
Corneal astigmatism was higher than 1.25 D in about 21% of cataract surgery candidates with slight differences between the various age ranges and had no correlation with age and sex.
分析白内障手术候选者的生物测量值及角膜散光患病率。
这是一项前瞻性研究。对白内障摘除手术候选患者在手术前采用光学低相干反射测量法（Lenstar LS 900）测量眼部生物测量值及角膜曲率性散光。评估生物测量尺寸和角膜曲率柱镜数据的描述性测量值及其与性别和年龄的相关性。
分析了2084例患者2084只眼的眼部生物测量值和角膜曲率值（平均年龄66.43岁，范围19 - 95岁）。平均值如下：角膜散光0.89屈光度（D），平均角膜曲率44.29 D，中央角膜厚度534μm，前房深度（ACD）3.11 mm，晶状体厚度4.50 mm，眼轴长度23.35 mm。1660只眼（79.5%）的角膜散光<1.25 D。976只眼（46.8%）的散光为顺规散光，702只眼（33.7%）为逆规散光，406只眼（19.5%）为斜向散光。角膜散光分析显示随年龄增长有向“逆规”变化的趋势，但无统计学意义。前房深度与年龄相关。角膜散光量与年龄和性别无关。
约21%的白内障手术候选者角膜散光高于1.25 D，各年龄范围之间略有差异，且与年龄和性别无关。
