翼状胬肉手术对角膜地形图的影响。

Effect of pterygium surgery on corneal topography.

作者信息

Errais K, Bouden J, Mili-Boussen I, Anane R, Beltaif O, Meddeb Ouertani A

机构信息

Department of Ophthalmology, Charles Nicolle University Hospital, Tunis, Tunisia.

出版信息

Eur J Ophthalmol. 2008 Mar-Apr;18(2):177-81. doi: 10.1177/112067210801800203.

DOI:10.1177/112067210801800203

PMID:18320508

Abstract

PURPOSE

To evaluate the effect of successful pterygium surgery on corneal topography.

METHODS

Computerized corneal topography was performed on 20 eyes with pterygium before and 3 months after successful excision and limbo-conjunctival autograft surgery. Corneal shape, corneal spherical power, simulated keratometric astigmatism, surface regularity index (SRI), and surface asymmetry index (SAI) were assessed before and after surgery. Pre- and postoperative uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), and manifest refraction spherical equivalent (MRSE) were also evaluated.

RESULTS

Changes in corneal shape were mainly a decrease in midline corneal flattening. Corneal spherical power was 41.65+/-3.29 diopters (D) (mean +/- SD) preoperatively and 44.58+/-1.55 D postoperatively (p=0.04). Simulated keratometric astigmatism was 5.47+/-3.45 D preoperatively and 1.79+/-1.52 D postoperatively (p=0.0005). SRI was 1.39+/-0.93 preoperatively and 1.10+/-0.57 postoperatively (p=0.03). SAI was 1.17+/-1.09 preoperatively and 0.75+/-0.73 postoperatively (p=0.02). UCVA was 0.31+/-0.33 preoperatively and 0.52+/-0.32 postoperatively (p=0.04). BSCVA was 0.73+/-0.20 preoperatively and 0.89+/-0.16 postoperatively (p=0.008). MRSE was -0.54+/-3.29 D preoperatively and -1.30+/-3.05 D postoperatively (p=0.45).

CONCLUSIONS

Corneal topographic changes caused by the pterygium are almost reversible after surgical treatment. Successful pterygium surgery significantly reduces topographic astigmatism, SRI, SAI, and corneal flattening. However, precise prediction of these refractive changes is not always accurate.

摘要

目的

评估成功的翼状胬肉手术对角膜地形图的影响。

方法

对20只患有翼状胬肉的眼睛在成功切除及行角膜缘结膜自体移植手术前和术后3个月进行电脑化角膜地形图检查。评估手术前后的角膜形状、角膜球镜度数、模拟角膜散光、表面规则性指数（SRI）和表面不对称指数（SAI）。还评估了术前和术后的裸眼视力（UCVA）、最佳矫正视力（BSCVA）和明显验光球镜等效度（MRSE）。

结果

角膜形状的变化主要是角膜中线变平程度降低。角膜球镜度数术前为41.65±3.29屈光度（D）（平均值±标准差），术后为44.58±1.55 D（p = 0.04）。模拟角膜散光术前为5.47±3.45 D，术后为1.79±1.52 D（p = 0.0005）。SRI术前为1.39±0.93，术后为1.10±0.57（p = 0.03）。SAI术前为1.17±1.09，术后为0.75±0.73（p = 0.02）。UCVA术前为0.31±0.33，术后为0.52±0.32（p = 0.04）。BSCVA术前为0.73±0.20，术后为0.89±0.16（p = 0.008）。MRSE术前为-0.54±3.29 D，术后为-1.30±3.05 D（p = 0.45）。