超薄瓣LASIK术后不同位置角膜知觉的变化

目的：探讨超薄瓣LASIK手术前后不同位置角膜知觉的变化。 方法：行超薄瓣LASIK手术43例84眼，测量手术前、术后1,3mo角膜中央、上方、下方、鼻侧、颞侧角膜知觉值，并对数据进行统计分析。 结果：术后1mo时，各位置角膜知觉值均有明显下降，与术前相比差异有统计学意义,其中中央角膜知觉下降最明显。至术后3mo除中央角膜知觉，其余位置角膜知觉均恢复至术前水平。中央角膜知觉与术后1mo时相比明显恢复，差异具有统计学意义。但与术前相比仍有所降低，差异具有统计学意义。 结论：超薄瓣LASIK手术导致角膜知觉下降，至术后3mo时基本恢复至术前水平。中央角膜知觉恢复需要更长的时间。

Effect of thin-flap LASIK on corneal sensitivity of different positions

AIM:To evaluate changes in corneal sensitivity of different positions following thin-flap laser in situ keratomileusis (LASIK). METHODS:Corneal sensitivity was measured in 43 cases (84 eyes) before and 1 month, 3 months after correction of myopia by thin-flap LASIK. Sensitivity measurements were made with an esthesiometer at the central,temporal,inferior,nasal and superior points on the corneal flap.The data were statistically analysed. RESULTS:The corneal sensitivities after thin-flap LASIK were reduced during the first month after surgery at any points on the corneal flap. Corneal sensitivity was significantly decreased at the central point. The corneal sensitivities of all the positions except the central point were recovered to preoperative levels at postoperative 3 months.Compared with postoperative 1 month, the central corneal sensitivity significanthy recovered, which has statistical significance. However, compared with preoperation, it decreased, which also has statistical significance. CONCLUSION: The corneal sensitivity is significantly reduced following thin-flap LASIK during the first month, with a return to preoperative levels at postoperative 3 months. The recovery of central corneal sensitivity needs more time.