PRK和LASIK偏中心切削分析  

Analysis of the decentration of ablation after PRK and LASIK for correction of myopia.

作　　者：生晖[1] 王传富[2] 卢奕[1] 

机构地区：[1]复旦大学附属眼耳鼻喉科医院眼科,上海200031 [2]青岛大学医学院附属医院眼科,山东青岛266003

出　　处：《眼外伤职业眼病杂志》2005年第2期92-94,共3页Journal of Injuries and Occupational Diseases of the Eye with Ophthalmic Surgeries

摘　　要：目的　分析准分子激光屈光性角膜切削术 (photorefractivekeratectomy ,PRK)和准分子激光原位角膜磨镶术 (laserinsitukeratomileusis ,LASIK)治疗近视偏中心切削及其与临床效果的关系。方法　对术前屈光度为 -3 0 0D～ -10 0 0D ,平均 (-6 0 8± 1 2 1)D76例 (15 0眼 )行PRK ,75例 (15 0眼 )行LASIK ,分为PRK和LASIK组。术后 1、3、6、12月行角膜地形图检查。结果　两组偏中心距离大部分≤ 0 5 0mm ,偏中心方位大多位于鼻上象限 ,差异无显著意义 (P >0 0 5 )。偏中心距离 >0 5 0mm时 ,裸眼视力较术前最佳矫正视力下降≥ 2行所占比例明显高于偏中心距离≤ 0 5 0mm者 (P <0 0 0 1)。结论　偏中心切削与PRK和LASIK的手术方式无关。偏中心距离≤ 0 5 0mm ,对视力的影响不大 ,偏中心距离 >0 5 0mm时 ,术后裸眼视力较差。Objective To analyze the decentration of ablation after photorefractive keratectomy(PRK)and laser in situ keratomileusis (LASIK)for correction of myopia.Methods A total of 151 patients(300 eyes) with preoperative refraction of 3.00D～-10.00D(-6.08±1.21)D were treated with PRK and LASIK and followed up for 12 months.The patients were divided into 2 groups:PRK group,76 cases(150 eyes);LASIK group,75 cases(150 eyes).Corneal topography was examined 1,3,6,12 months postoperatively,and associations with postoperative outcomes were analyzed.Results Decentration was similar after PRK and LASIK,there was no statistical significant difference between them (P>0.05).In most cases,decentration was less than 0.50mm and located at superior nose.Conclusions Decentration more than 0.50mm affected the postoperative UCVA greatly.Computer assisted corneal topography system plays an important role in PRK and LASIK.

关 键 词：准分子激光屈光性角膜切削术 准分子激光原位角膜磨镶术 角膜地形图 近视 偏中心 

分 类 号：R779.63[医药卫生—眼科]