影响准分子激光屈光性角膜切削术疗效的多因素分析  

Mutiple Factors Analysis of the Effects of Excimer Laser Photorefractive Keratectomy

作　　者：夏晓波[1] 刘双珍[1] 黄佩刚[1] 吴振中[1] 谭星平 梅萼 胡生发[1] 

机构地区：[1]湖南医科大学附属湘雅医院眼科激光中心,长沙410008

出　　处：《眼科学报》1997年第2期75-78,共4页Eye Science

摘　　要：目的:观察准分子激光屈光性角膜切削术(PRK)治疗近视、散光的疗效,探讨影响疗效的相关因素。方法:采用VISX20/2O型准分子激光仪对306例(529眼)近视、散光患者进行PRK手术。术前等值球镜屈光度为-1.00～16.00D(-6.55±3.19D),分为两组:Ⅰ组:-1.00～6.00D,294眼;Ⅱ组:-6.25～16.00D,235眼。随访3～12个月。结果:术后12个月,裸眼视力≥0.5、1.0者在Ⅰ组分别为97.5％、77.5％,在Ⅱ组分别为80.3％、32.8％;实际矫正度在预测矫正度±1.00D内者在Ⅰ、Ⅱ组分别为92.5％、42.6％。影响术后屈光度变化的因素:术后角度上皮下雾状混浊(Haze)程度、去上皮的方法、眼压、术前中央角膜厚度。结论:PRK治疗-6.00D以内的近视是一种安全、稳定、预测性强、有效的方法。术前应根据屈光度、年龄、角膜厚度、眼压、设计手术方案,术中强调采用激光去除上皮。眼科学报1997;Purpose:To observe the effect of excimer laser photorefractive keratectomy (PRK) correcting myopia and astigmatism, and to study the related factors. Method: PRK was performed with the aim to correct myopia errors from 1.00 to 16. 00 diopters on 529 mypoia eyes (306 patients). All eyes were divided into two groups: Group I : - 1. 00 - 6. 00D(294 eyes); group II : - 6. 25 - 16. 00D(235 eyes). All the patients were followed up for 3 to 12 months. Results:At postoperative 12 months the rates of unconnected visual acuity more than or equal to 10/20 or 20/20 were 97.5% , 77.5% in group I ,and 80.3% ,32.8%in group II respectively; 92. 5% of eyes were within ±1.00 diopter of the desired em-metropia in group I , but 42.6% in gropu II ; The influential factors of changes of postoperative diopters was the severity of corneal haze, methods of removing corneal epithelium, intraocular pressure, the central corneal thickness. Conclusion:The excimer laser PRK is regarded to be a very predictable, safe, stable, and effective method to correct myopia up to - 6. 00D. Prior to operation, the plan would be disigned according to diopters, ages, corneal thickness intraocular pressure. During operation, the corneal epithelium bad better to be removed by laser. Eye Science 1997; 13 :75 - 78.

关 键 词：近视 散光 准分子激光 角膜切削术 

分 类 号：R779.63[医药卫生—眼科]