CAJ | 학술논문

目的比较机械法准分子激光前弹力层下角膜磨镶术(SBK)治疗近视前后暗环境下对比度视力及反应时间的变化规律,评估术后视觉质量.方法前瞻性病例自身对照研究.对行SBK手术治疗近视的患者20例(40眼),应用多功能电子视力测量仪(型号MFVA-100)测量术前、术后1个月、术后3个月暗环境暗背景下100％、25％、10％、5％4个对比度下的logMAR视力及反应时间.采用方差分析和q检验对获得的数据进行处理.结果在暗环境暗背景下,随着对比度的下降,logMAR视力值呈增大趋势.在100％、25％对比度下,术前及术后不同时间段(1个月、3个月)对比度视力之间的差异有统计学意义(F=7.740、3.203,P均＜0.05).术后1个月、3个月与术前比较,logMAR视力值下降,差异有统计学意义(q=4.722、5.167,P＜0.05；q=3.000、3.217,P＜0.05)；术后1个月与3个月比较,差异无统计学意义(q=0.444、0.217,P＞0.05).在10％、5％对比度下,术前及术后不同时间段(1个月、3个月)对比度视力的差异无统计学意义(F=1.647、1.382,P均＞0.05).随着对比度的下降,反应时间呈延长趋势.在100％对比度下,术后1个月、3个月反应时间较术前缩短,术前、术后1个月、术后3个月三者之间差异无统计学意义(F=0.484,P＞0.05).在25％、10％、5％对比度下,术后反应时间延长,术前、术后1个月、术后3个月三者之间差异均无统计学意义(F=0.049、1.073、0.637,P均＞0.05).结论机械法SBK治疗近视后,暗环境下100％、25％对比度视力提高,10％、5％对比度视力无显著变化,各对比度下反应时间无显著变化.SBK术后患者可获得良好的视觉质量,对比度视力和反应时间可作为评价SBK疗效的依据之一.
목적 비교궤계법준분자격광전탄력층하각막마양술(SBK)치료근시전후암배경하대비도시력급반응시간적변화규률,평고술후시각질량.방법 전첨성병례자신대조연구.대행SBK수술치료근시적환자20례(40안),응용다공능전자시력측량의(형호MFVA-100)측량술전、술후1개월、술후3개월암배경암배경하100％、25％、10％、5％4개대비도하적logMAR시력급반응시간.채용방차분석화q검험대획득적수거진행처리.결과 재암배경암배경하,수착대비도적하강,logMAR시력치정증대추세.재100％、25％대비도하,술전급술후불동시간단(1개월、3개월)대비도시력지간적차이유통계학의의(F=7.740、3.203,P균＜0.05).술후1개월、3개월여술전비교,logMAR시력치하강,차이유통계학의의(q=4.722、5.167,P＜0.05；q=3.000、3.217,P＜0.05)；술후1개월여3개월비교,차이무통계학의의(q=0.444、0.217,P＞0.05).재10％、5％대비도하,술전급술후불동시간단(1개월、3개월)대비도시력적차이무통계학의의(F=1.647、1.382,P균＞0.05).수착대비도적하강,반응시간정연장추세.재100％대비도하,술후1개월、3개월반응시간교술전축단,술전、술후1개월、술후3개월삼자지간차이무통계학의의(F=0.484,P＞0.05).재25％、10％、5％대비도하,술후반응시간연장,술전、술후1개월、술후3개월삼자지간차이균무통계학의의(F=0.049、1.073、0.637,P균＞0.05).결론 궤계법SBK치료근시후,암배경하100％、25％대비도시력제고,10％、5％대비도시력무현저변화,각대비도하반응시간무현저변화.SBK술후환자가획득량호적시각질량,대비도시력화반응시간가작위평개SBK료효적의거지일.
Objective To evaluate the changes in visual acuity and reaction times at different contrast levels in myopic patients before and after sub-Bowman's keratomileusis (SBK).Methods This was a prospective self-control study.A total of 20 patients (40 eyes) who had undergone SBK were enrolled in this study.LogMAR contrast visual acuity and reaction times were measured by the multi-functional visual acuity tester (MFVA-100) at 4 contrast levels (100％,25％,10％,5％) with a dark background in a dark environment before surgery and 1 month and 3 months after surgery.Data were analyzed using ANOVA and SNK.Results At the same room illumination,logMAR values gradually increased as contrast levels decreased.The postoperative logMAR values at 100％ and 25％ contrasts were significantly lower than preoperative values (q=4.722,5.167,P＜0.05; q=3.000,3.217,P＜0.05),but the differences were not significant at 10％ and 5％ contrast levels (F=1.647,1.382,P＞0.05).Reaction time increased with decreases in contrast levels.The postoperative reaction times became shorter at contrast levels of 100％,but were longer at 25％,10％ and 5％ contrast levels.The differences were not significant (F=0.484,0.049,1.073,0.637,P＞0.05).Conclusion After SBK,the logMAR values at 100％ and 25％ contrast levels were reduced,but there were no significant differences at 10％ and 5％ contrast levels.The surgery has no effect on reaction times at the 4 contrast levels.Myopic patients can acquire good contrast visual acuity in a dark environment after SBK.Contrast visual acuity and reaction time may be used as one of the bases to evaluate the effects of the surgery.