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为观察准分子激光屈光性角膜切削术（ｐｈｏｔｏｒｅｆｒａｃｔｉｖｅｋｅｒａｔｅｃｔｏｍｙ，ＰＲＫ）和准分子激光原位角膜磨镶术（ｌａｓｅｒｉｎ－ｓｉｔｕｋｅｒ－ａｔｏｍｉｌｅｕｓｉｓ，ＬＡＳＩＫ）术后对比敏感度的变化，评价这两种手术后视功能的改变，对术前屈光度为－１．７５Ｄ至－７．７５Ｄ，在我院接受ＰＲＫ手术的３６只眼和接受ＬＡＳＩＫ手术的３１只眼，采用电生理方法检查手术前后远对比敏感度，用Ｆ．Ａ．Ｃ．Ｔ对比敏感度表检查近对比敏感度。所有患者术前最佳矫正视力均为１．０以上。结果：ＰＲＫ和ＬＡＳＩＫ术后几个月内远、近对比敏感度均有不同程度的降低，以中频段下降幅度最大。对比敏感度于ＰＲＫ术后１２个月、ＬＡＳＩＫ术后６个月恢复术前水平。结论：ＰＲＫ和ＬＡＳＩＫ术后均出现暂时的对比敏感度下降，ＬＡＳＩＫ术后对比敏感度恢复较ＰＲＫ快。
To observe the changes of contrast sensitivity after photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK), we evaluated the postoperative visual acuity Function changes, preoperative refractive power of -1.75D to -7.75D, PRK surgery in our hospital of 36 eyes and 31 eyes received LASIK surgery, the use of electrophysiological methods to check the far and near contrast sensitivity, Use F. A. C. T contrast sensitivity table check the contrast sensitivity. All patients with best corrected visual acuity were 1.0 or more. Results: Within several months after PRK and LASIK, the contradistinctive sensitivity of both far-side and near-side decreased to different extents, with the largest decrease in the middle frequency band. Contrast sensitivity was restored 12 months after PRK and 6 months after LASIK. Conclusions: The temporary contrast sensitivity decreases after PRK and LASIK, and the contrast sensitivity recovery after LASIK is faster than PRK.