准分子激光角膜切削术治疗近视和近视散光的临床观察

A clinical investigation on photorefractive keratectomy for the correctionof myopia and myopic astigmatism

目的观察准分子激光角膜切削术治疗近视和近视散光的临床结果。方法３０７例５５８只眼按术前散光度数分４组。Ⅰ组：１６８只眼，无散光；Ⅱ组：２６８只眼，散光－０．２５～－１．００Ｄ；Ⅲ组：８７只眼，散光－１．２５～－２．００Ｄ；Ⅳ组：３５只眼，散光－２．２５～－４．２５Ｄ。全部病例术后随访６个月以上。结果术后裸眼视力Ⅰ组显著好于其它３组，Ⅱ、Ⅲ、Ⅳ３组间无差异。术后残留散光度数：Ⅰ组－０．０７±０．２１Ｄ，Ⅱ组－０．１３±０．４３Ｄ，Ⅲ组－０．１９±０．５３Ｄ，Ⅳ组－０．４７±０．６２Ｄ。结论ＰＲＫ同时治疗近视和近视散光影响球镜矫正的预测性；

ObjectiveTo observe the outcome of photorefrative keratectomy(PRK)for the correction of myopia and myopic astigmatism.MethodsAccording to the degree of preoperative astigmatism,307 patients(558 eyes)were divided into four groups:group Ⅰ,168 eyes,no astigmatism;group Ⅱ,268 eyes,astigmatism-0.25～-1.00D;group Ⅲ,87 eyes,astigmatism-1.25～ -2.00D ;group Ⅳ,35 eyes,astigmatism -2.25～-4.25D.After treatment,all patients were followed up for 6 months or more.ResultsPostoperative uncorrected visual acuity in group I was significantly better than that in other three groups ( P <0.01),and there was no statistically significant difference( P >0.05) among group Ⅱ,Ⅲ,Ⅳ.Residual refractive cylinder was-0.07±0.21D in group Ⅰ, -0.13 ±0.43D in group Ⅱ,-0.19±0.53D in group Ⅲ,and -0.47±0.62D in group Ⅳ.ConclusionThe correction of astigmatism with PRK reduced the predictability of spherical correction.Regression has been observed after PRK in myopic astigmatism.