Wavescan波前像差仪测量屈光不正的准确性研究

Accuracy of Wavescan aberrometer in measurement of refractive errors

目的:评价Wavescan波前像差仪测量近视眼屈光不正的准确性。方法:对33例66眼行屈光不正矫正术的患者分别用电脑验光(睫状肌麻痹和非睫状肌麻痹下)、显然验光、Wavescan波前像差仪法测量眼屈光不正,并将患者按屈光不正度数分为3组:低度近视组(-0.50～-3.00D)17眼,中度近视组(-3.00～-6.00D)27眼,高度近视组(-6.00～D)22眼。对测量的结果进行两两比较,采用配对t检验分析。结果:四种验光方法测量的验光结果(球镜、柱镜、等效球镜)显示,低度近视及高度近视组,显然验光与Wavescan波前像差仪验光球镜及柱镜度数比较没有统计学差异(P=0.289,P=0.814,P=0.057,P=0.246),睫状肌麻痹状态下验光与Wavescan波前像差仪验光在中高度近视组,球镜度数及柱镜度数之间的比较差异没有统计学意义(P=0.052,P=0.111,P=0.539,P=0.154),并且结果不随屈光状态的不同而不同,而等效球镜度数之间的差异具有统计学意义。Wavescan波前像差仪和显然验光及睫状肌麻痹状态下验光测量,结果比较,随屈光不正度数增加,球镜相符率降低,柱镜相符率升高。结论:Wavescan波前像差仪测量屈光不正有较高的准确性,可以很好地用于VISXSTARS4准分子激光治疗系统个体化切削治疗使用,但与显然验光和睫状肌麻痹状态下验光比较仍有差异,可以作为以上两种验光方法的参考和补充。

AIM： To value the accuracy of Wavescan aberrometer in measuring refractive errors for myopic eyes. METHODS： Sixty-six eyes of 33 patients were divided into three groups ： mild myopia （-0.50～-3.00D）17 eyes , moderate myopia （-3.00～-6.00D）27 eyes and high myopia （-6.00D～） 22 eyes based on measurement with autorefractor after cycloplegia and non-cycloplegia. Same examination was made in all the patients using Wavescan aberrometer and the results were statistically compared between the two measurements with paired t- test. RESULTS： There was no significant difference in spherical and cylinder refraction between manifest refraction and Wavescan aberrometer in low and high myopia group（P=0.289,P=0.814,P=0.057,P=0.246）; there was no significant difference in spherical and cylinder refraction between cycloplegia refraction and Wavescan aberrometer among low myopic, moderate myopic and high myopic eyes. Wavescan aberrometer and autorefractor after cycloplegia decreased with the increasing degrees of myopia. However this matching rate in cylinder increased with the increasing degrees of myopia. CONCLUSION： Wavescan aberrometer, as an assistant modality of VISX STAR S4 LASIK system, is highly accurate in refractive measurement. There are still some differences between Wavescan aberrometer and autorefractor after cycloplegia.