He Rui, Qu Min, Fen Yi, Yu Shun
Shanxi Eye Hospital, Taiyuan, China.
J Refract Surg. 2006 Nov;22(9 Suppl):S1053-5. doi: 10.3928/1081-597X-20061102-09.
To evaluate the visual acuity after LASIK in patients with high myopia and in patients with preoperative best spectacle-corrected visual acuity (BSCVA) <0.6.
This retrospective study comprised 97 consecutive eyes in 57 patients who underwent LASlK. Preoperative spherical refractive error ranged from -1.75 to -22.00 diopters (D) (mean: -11.77+/-3.61 D) with mean astigmatism of -1.54+/-10.6 (range: 0 to -4.00 D). Pre- and postoperative BSCVA and uncorrected visual acuity (UCVA) were measured and analyzed.
The mean preoperative BSCVA was 0.54+/-0.07 (range: 0.3 to 0.6). The mean postoperative BSCVA was 0.75+/-0.16 (range: 0.5 to 1.2). The mean postoperative UCVA was 0.60+/-0.25 (range: 0.5 to 1.2). A statistically significant improvement was noted in the mean postoperative BSCVA compared with the mean preoperative BSCVA (t=12.78; P<.001) and mean postoperative UCVA compared with preoperative mean BSCVA (t=2.866; P<.01). The safety index was 1.38, which was statistically significant (P<.001). The efficacy index was 1.11, which was statistically significant (P<.01).
LASIK improved the mean postoperative BSCVA and UCVA compared with preoperative BSCVA in highly myopic eyes with reduced BSCVA.
评估高度近视患者以及术前最佳矫正视力（BSCVA）<0.6的患者在准分子激光原位角膜磨镶术（LASIK）后的视力。
这项回顾性研究纳入了57例接受LASIK手术的97只连续眼。术前球镜屈光不正范围为-1.75至-22.00屈光度（D）（平均：-11.77±3.61 D），平均散光为-1.54±1.06（范围：0至-4.00 D）。测量并分析术前和术后的BSCVA及裸眼视力（UCVA）。
术前平均BSCVA为0.54±0.07（范围：0.3至0.6）。术后平均BSCVA为0.75±0.16（范围：0.5至1.2）。术后平均UCVA为0.60±0.25（范围：0.5至1.2）。与术前平均BSCVA相比，术后平均BSCVA有统计学显著改善（t = 12.78；P <.001），与术前平均BSCVA相比，术后平均UCVA也有统计学显著改善（t = 2.866；P <.01）。安全指数为1.38，具有统计学显著性（P <.001）。有效指数为1.11，具有统计学显著性（P <.01）。
与术前BSCVA降低的高度近视眼相比，LASIK提高了术后平均BSCVA和UCVA。
