CAJ | 학술논문

目的利用角膜地形图评价LASIK治疗-2.0D以上散光疗效的准确性.方法对25例(36只眼)散光度在-2.0D以上的近视散光患者于LASIK手术前后行角膜地形图和主觉验光检查,并将主觉验光测得的散光值换算成角膜平面的散光值,随访6月以上,比较手术前后角膜地形图测得的角膜散光的改变情况以及主觉验光所得的散光改变.结果手术前后平均角膜地形图散光大小分别为(-2.29±0.61)D和(-1.91±0.68)D,主觉验光手术前后平均角膜平面的散光大小分别为(-2.22±0.61)D和(-0.46±0.43)D,两者手术前后差异均有统计学意义(P<0.05);手术前后平均角膜地形图散光轴位改变(3.19±3.04)度,手术前后显性散光轴位改变(29.61±29.49)度;术前角膜地形图散光和术前显然验光角膜平面的散光大小差异无统计学意义(P>0.05),散光轴位平均差异为(6.53±14.19)度,而术后角膜地形图散光和术后显然验光角膜平面的散光大小差异有统计学意义(P=0.00).结论角膜地形图测量术前-2.0D以上散光与主觉验光结果基本一致,但LASIK术后,角膜地形图往往高估术后的散光值.
목적 이용각막지형도평개LASIK치료-2.0D이상산광료효적준학성.방법 대25례(36지안)산광도재-2.0D이상적근시산광환자우LASIK수술전후행각막지형도화주각험광검사,병장주각험광측득적산광치환산성각막평면적산광치,수방6월이상,비교수술전후각막지형도측득적각막산광적개변정황이급주각험광소득적산광개변.결과 수술전후평균각막지형도산광대소분별위(-2.29±0.61)D화(-1.91±0.68)D,주각험광수술전후평균각막평면적산광대소분별위(-2.22±0.61)D화(-0.46±0.43)D,량자수술전후차이균유통계학의의(P<0.05);수술전후평균각막지형도산광축위개변(3.19±3.04)도,수술전후현성산광축위개변(29.61±29.49)도;술전각막지형도산광화술전현연험광각막평면적산광대소차이무통계학의의(P>0.05),산광축위평균차이위(6.53±14.19)도,이술후각막지형도산광화술후현연험광각막평면적산광대소차이유통계학의의(P=0.00).결론 각막지형도측량술전-2.0D이상산광여주각험광결과기본일치,단LASIK술후,각막지형도왕왕고고술후적산광치.
Objective To investigate the accuracy of the effects of laser in situ keratomileusis (LASIK) on astigmatism of -2.0D or above assessed by corneal topography.Methods Thirty-six eyes of 25 patients with astigmatism of-2.0D or above who underwent LASIK were included in this retrospective study. Corneal topography and subjective refraction examination were performed before and at least 6 months after surgery.The astigmatism of subjective refraction was translated to cylinder diopter of corneal plane.Astigmatism measured with corneal topography and that of subjective refraction was compared before and after the surgery. Results The mean astigmatism measured by corneal topography was (-2.29±0.61) D and (-1.91±0.68) D pre- and postoperative respectively.The meaa astigmatism in corneal plane measured by manifest refraction was (-2.22±0.61) D and (-0.46±0.43) D pro- and postoperative respectively.The differences between pre- and post-operation were both statistically significant (P<0.05).The mean difference between pre- and post-operation in axis of astigmatism measured by corneal topography and manifest refraction was 3.19±3.04 degree and 29.61±29.49 degree, respectively.The meaa difference in axis of astigmatism measured by corneal topography and manifest refraction was (6.53±14.19) degree preoperatively.The difference in magnitude of refractive and corneal astigmatism was not statistically significant preoperatively (P =0.54), but was significant postoperatively (P=0.00).Conclusions Astigmatism of-2.0D or above measured by corneal topography has agreement with that measured by subjective refraction pre-operatively, however, the astigmatism post-LASIK can always be overestimated by corneal topography.