DCT和GAT对LASIK手术前后眼压的比较性研究

目的 评价动态轮廓眼压计(DCT)和Goldmann压平眼压计(GAT)对在准分子激光原位角膜磨镶术(LASIK)手术前后眼压测量值的变化.方法 取71例141只眼近视患者在LASIK术前和术后一周分别进行角膜厚度(CCT)、GAT、DCT测量.结果 ①LASIK手术前后DCT测得值尤显著性差异(P=0.062),GAT测得值有显著性差异(P＜0.001),CCT测得值有显著性差异(P＜0001).②Bland-Altman分析示LASIK手术前后DCT与GAT两种测量方法均呈现高度一致性.术前DCT测量值高于GAT测量值1.1mmHg,95%可信区间为(-0.6,2.8)mmHg;术后DCT测量值高于GAT测量值8.2mmHg,95%可信区间为(5.3,11.1)mmhg.③△GAT与△CCT呈正相关,△DCT与△CCT无统计相关性.结论 DCT测量值不受LASIK手术切削的影响,更适合于LASIK手术前后眼压的测量.

Analysis of the changes ofintraocular tension after myopic laser in situ keratomileusis using DCT and GAT

Objective To compare IOP measurements using Goldmann applanation tonometry (GAT) and Dynamic contour tonometer (DCT) in eyes undergoing LASIK for correction of myopia.Methods In prospective,71 patients (141 eyes) were treated by LASIK for myopia,central corneal thickness (CCT) 141 normal eyes before and aider LASIK.Bland-Altman analysis of individual pairs of DCT and GAT measurements before and after LASIK revealed a bias of 1.1 mmHg,95% confidence interval from -0.6 mmHg to tion reduced IOP readings as measured by GAT.In contrast,no significant change in IOP readings was recorded by DCT.Conclusions IOP readings recorded by DCT were not be affected by LASIK for myopia.Thus,DCT is more suitable to measure IOP before and after surgery.