Langrová H, Hejcmanová D, Peregrin J
Ocní klinika FN, Hradec Králové, CSc.
Cesk Slov Oftalmol. 1998;54(5):328-34.
I. 100 myopes (-0.25-(8.75) D) divided into 3 groups (I: < -3.0 D, II: -3.0-(-5.75) D, III: -6.0-(-8.75) D) were examined before and 1, 3, 6 months after photorefractive keratectomy (PRK). As a control group 20 emmetropes were examined. Best corrected visual acuity (BCVA) was tested using logMAR charts. Contrast sensitivity (CS) was measured using a computerized system. II. Preoperative BCVA in myopes of all three groups was significantly lower (p < 0.001) compared to the control group. A significant reduction of BCVA (p < 0.05 resp. p < 0.001) in all groups at all terms after PRK was noted. III. Significantly lower values of CS (p < 0.001) were found in myopes of all groups before PRK in comparison to the control group. One and 3 months after PRK only nonsignificant changes of the mean values of contrast sensitivity (MCK) were noted. After 6 months a significant improvement of MCK (p < 0.05) in myopes of I. and II. groups was observed.
一、100名近视患者（-0.25 -（8.75）D）被分为3组（I组：＜-3.0 D，II组：-3.0 -（-5.75）D，III组：-6.0 -（-8.75）D），在准分子激光角膜切削术（PRK）前以及术后1、3、6个月接受检查。作为对照组，对20名正视眼者进行了检查。使用对数最小分辨角视力（logMAR）图表测试最佳矫正视力（BCVA）。使用计算机系统测量对比敏感度（CS）。二、与对照组相比，所有三组近视患者术前的BCVA均显著更低（p＜0.001）。注意到在PRK术后所有时间段，所有组的BCVA均显著下降（分别为p＜0.05和p＜0.001）。三、与对照组相比，所有组近视患者在PRK术前的CS值均显著更低（p＜0.001）。PRK术后1个月和3个月，仅观察到对比敏感度平均值（MCK）的非显著变化。6个月后，观察到I组和II组近视患者的MCK有显著改善（p＜0.05）。
