[准分子激光角膜切削术后12个月近视患者视觉功能的变化]

[Changes in visual function in myopia 12 months after photorefractive keratectomy].

Langrová H, Hejcmanová D, Peregrin J

Ocní klinika FN, Hradec Králové.

Cesk Slov Oftalmol. 1999 Nov;55(6):335-45.

Abstract

110 myopes undergoing photorefractive keratectomy (PRK) with refraction from -0.25 D to -12.0 D were divided into 4 groups: A: upto -2.75 D, B: -3.0 D to -5.75 D, C: -6.0 D to -8.75 D and D: -9.0 D to -12.0 D. BCVA using the computerized method with Landolt rings and CS using an adjustment method with ascendant and descendent approach to threshold contrast adaptation on a computerized system of the Contrast sensitivity 8010 type were examined in patients before and 1 year after PRK. 20 emmetropes of the same median age were evaluated as a control group. 2. Preoperative BCVA and CS in myopes of all four groups was significantly lower (p < 0.05 az p < 0.001), compared to controls. Decrease of functions was proportional to refraction. 3. With increasing refraction less patients were within +/- 0.5 D and +/- 1.0 after surgery. 4. Twelve months after PRK, BCVA in the group A reached the level of controls, CS in the same time interval was equal to control even in groups A and B. 5. According to results of our study, PRK is a suitable method for myopia upto -6.0 D.

摘要

110名接受屈光性角膜切削术（PRK）、屈光度在-0.25 D至-12.0 D之间的近视患者被分为4组：A组：屈光度达-2.75 D；B组：-3.0 D至-5.75 D；C组：-6.0 D至-8.75 D；D组：-9.0 D至-12.0 D。在PRK术前及术后1年，使用带兰多尔特环的计算机化方法检查患者的最佳矫正视力（BCVA），并使用对比度敏感度8010型计算机系统上的上升和下降阈值对比度适应调整方法检查对比敏感度（CS）。选取20名年龄中位数相同的正视者作为对照组进行评估。2. 与对照组相比，所有四组近视患者术前的BCVA和CS均显著降低（p<0.05至p<0.001）。功能下降与屈光度成正比。3. 随着屈光度增加，术后屈光在±0.5 D和±1.0 D范围内的患者减少。4. PRK术后12个月，A组的BCVA达到对照组水平，在同一时间间隔内，即使是A组和B组的CS也与对照组相当。5. 根据我们的研究结果，PRK是治疗屈光度达-6.0 D近视的合适方法。