低度数近视患者接受准分子原位角膜磨镶术或屈光性角膜切削术后未矫正视力的恢复情况。

Recovery of uncorrected visual acuity after laser in situ keratomileusis or photorefractive keratectomy for low myopia.

作者信息

Walker M B, Wilson S E

机构信息

Department of Ophthalmology, The University of Washington School of Medicine, Seattle, USA.

出版信息

Cornea. 2001 Mar;20(2):153-5. doi: 10.1097/00003226-200103000-00007.

DOI:10.1097/00003226-200103000-00007

PMID:11248818

Abstract

PURPOSE

To compare uncorrected visual acuity and refractive error in patients undergoing photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) between 1 week and 6 months after surgery.

METHODS

All eyes underwent PRK or LASIK with the VisX StarS2 excimer laser. We retrospectively analyzed data from 77 random eyes of 77 patients in the PRK group and 76 eyes of 76 patients in the LASIK group. All eyes had a low myopic refractive error (spherical equivalent range, -0.88 diopters (D) to -5.13 D; mean PRK. -2.8 +/- 0.20 D: LASIK, -2.5 +/- 0.22 D). Uncorrected visual acuity and manifest refractive error were evaluated 1 week, 1 month, and 6 months after surgery.

RESULTS

Each eye undergoing PRK was paired with an eye undergoing LASIK for a similar level of spherical equivalent. Mean uncorrected visual acuity after 1 week was 0.85 +/- 0.06 (20/25, logMAR 0.12 +/- 0.04) for the PRK group and 1.01 +/- 0.06 (20/20, logMAR 0.01 +/- 0.03) for the LASIK group (p < 0.001). Mean spherical equivalent after 1 week was 0.23 +/- 0.12 D for the PRK group and -0.02 +/- 0.07 D for the LASIK group (p = 0.02). Mean uncorrected visual acuity after 1 month was 1.03 +/- 0.05 (20/20, logMAR 0.02 +/- 0.03) for the PRK group and 1.05 +/- 0.05 (20/20. -0.02 +/- 0.03) for the LASIK group (p = 0.16). Mean spherical equivalent after I month was 0.19 +/- 0.10 D for the PRK group and -0.02 +/- 0.09 D for the LASIK group. This difference was statistically significant (p = 0.02), but was unlikely to be clinically significant. Mean uncorrected visual acuity after 6 months was 1.05 +/- 0.06 (20/20, logMAR -0.01 +/- 0.03) for the PRK group and 1.06 +/- 0.05 (20/20, logMAR -0.14 +/- 0.03) for the LASIK group (p = 0.41). Mean spherical equivalent after 6 months was 0.02 +/- 0.08 D for the PRK group and 0.00 +/- 0.08 D for the LASIK group (p = 0.35).

CONCLUSION

Uncorrected visual acuity 1 week after surgery is significantly better in eyes undergoing LASIK than in eyes undergoing PRK. Both procedures provide functional vision by 1 week after surgery. The difference does not relate to refractive error, which was similar between the two groups, but to differences in healing of the epithelium. By 1 month after surgery, there is no difference in mean uncorrected visual acuity between eyes that undergo PRK or LASIK for low myopia.

摘要

目的

比较接受准分子激光角膜切削术（PRK）和准分子原位角膜磨镶术（LASIK）的患者在术后1周和6个月时的未矫正视力和屈光不正情况。

方法

所有眼睛均使用威视StarS2准分子激光进行PRK或LASIK手术。我们回顾性分析了PRK组77例患者的77只随机眼和LASIK组76例患者的76只眼的数据。所有眼睛均为低度近视屈光不正（等效球镜范围为-0.88屈光度（D）至-5.13 D；PRK组平均为-2.8±0.20 D；LASIK组平均为-2.5±0.22 D）。在术后1周、1个月和6个月时评估未矫正视力和明显屈光不正情况。

结果

为每只接受PRK的眼睛配对一只等效球镜水平相似的接受LASIK的眼睛。PRK组术后1周时平均未矫正视力为0.85±0.06（20/25，logMAR 0.12±0.04），LASIK组为1.01±0.06（20/20，logMAR 0.01±0.03）（p<0.001）。PRK组术后1周时平均等效球镜为0.23±0.12 D，LASIK组为-0.02±0.07 D（p = 0.02）。PRK组术后1个月时平均未矫正视力为1.03±0.05（20/20，logMAR 0.02±0.03），LASIK组为1.05±0.05（20/20，logMAR -0.02±0.03）（p = 0.16）。PRK组术后1个月时平均等效球镜为0.19±0.10 D，LASIK组为-0.02±0.09 D。这种差异具有统计学意义（p = 0.02），但不太可能具有临床意义。PRK组术后6个月时平均未矫正视力为1.05±0.06（20/20，logMAR -0.01±0.03），LASIK组为1.06±0.05（20/20，logMAR -0.14±0.03）（p = 0.41）。PRK组术后6个月时平均等效球镜为0.02±0.08 D，LASIK组为0.00±0.08 D（p = 0.35）。