Abstract
目的 检测O值引导的个体化切削模式(fineadjusted-customized ablation treatment,F-CAT)准分子激光原住角膜磨镶术(laser in situ keratomileusis,LASIK)术前术后对比敏感度和眩光敏感度,并与常规LASIK方法 比较,评价该手术对对比敏感度的影响.方法 使用德国WAVE-UGHT公司的ALLEGRETTO角膜地形图仪、ALLEGRETTO像差仪、ALLEGRETYO WAVE Eye-Q准分子激光系统,对23例(46眼)近视患者行F-CAT,22例(44眼)近视患者行常规的LASIK手术作为对照.使用CGT-1000对比敏感度仪检测两组患者在术前、术后第1个月及术后第3个月的对比敏感度和眩光敏感度.结果 F-CAT组与常规组术后裸眼视力差异无显著性(P＞0.05).F-CAT组角膜Q20值为-0.12±0.24,常规组为0.15±0.21,差别有显著性(P＜0.05).F-CAT组术后球差增加5倍,常规组增加7倍,但两组间球差差异无显著性(P＞0.05).术后第1个月及第3个月F-CAT组对比敏感度在各频段与术前比较均差异无显著性;常规组术后第1个月对比敏感度在各频段较术前下降,在4.0'及2.5'两频段与术前相比差异有显著性;术后第3个月对比敏感度略有回升,各频段与术前比较差别无显著性.F-CAT组与常规组术后第1个月及第3个月在4.0'及2.5'两频段差异有显著性(P＜0.05).F-CAT组术后眩光敏感度与术前比较均差异无显著性.常规组术后第1个月眩光敏感度在4.0'、2.5'、1.6'三频段较术前下降,差异有显著性(P＜0.05).术后第3个月眩光敏感度回升,各频段与术前比较差异无显著性.术后第1个月、第3个月两组间在4.0'及2.5'、1.6'频段差异有显著性(P＜0.05).结论 F-CAT术后,角膜中央Q值保持负值,减少球差增加的倍数,使患者的对比敏感度和眩光敏感度优于常规组,有更好的视觉质量。
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