不同切削模式LASIK治疗中高度复性近视散光疗效

目的 评价不同切削模式LASIK治疗中高度复性近视散光的疗效.方法 应用美国雷赛LSX准分子激光机(5.3版)进行LASIK手术,常规球柱切削模式组(23只眼),术前平均裸眼视力(UCVA):0.15±0.09,球镜度数:(-4.40±2.07)D,柱镜度数(-2.42±0.47)D,随访时间(6.04±3.74)月;椭球切削模式组(33只眼),UCVA:0.13±0.05,球镜度数(-5.43±2.26)D,柱镜度数(-2.71±0.76)D,随访时间(6.91±5.10)月.结果 两组术后UCVA分别为1.11±0.17和1.05±0.10,球镜度数(-0.17±-0.77)D和(-0.18±0.89)D,柱镜度数(-0.62±0.39)D和(-0.64±0.68)D,两组间差异无统计学意义(P>0.05),术后Q值:0.60±0.35和0.29±0.59,两组间差异具有统计学意义(P<0.05).结论 LASIK 两种切削模式治疗中高度复性近视散光疗效确切、稳定,椭球型切削模式术后Q值更容易维持术前负性特征.

Excimer Laser in different ablation model for moderate and high compound myopic astigmatism

Objective To determine the safety and efficacy of laser in situ keratomileusis (LASIK) in standard sphere/cylindrical or ellipsoidal ablation model to treat moderate and high compound myopic astigmatism. Methods The LaserSight SLX laser (5.3 software) was used in LASIK. In standard sphere/cylindrical ablation model group (23 eyes), the preoperative mean uncorrected visual acuity (UCVA) was 0.155: 0.09,sphere -4.40± 2.07D, cylinder -2.42± 0.47D, the final follow-up 6.04± 3.74 months. In ellipsoidal ablation model group (33 eyes), the UCVA was 0.13± 0.05, sphere -5.43±2.26D, cylinder-2.71± 0.76D, the final follow-up 6.91± 5.10 months. Results In two groups, the UCVA was 1.11± 0.17 and 1.05± 0.10, sphere -0.17± 0.77D and-0.18± 0.89, cylinder-0.62± 0.39D and-0.64± 0.68, respectively. No statistical different was found (P > 0.05 ). However, the postoperatively mean corneal asphericity (Q-value) was 0.60± 0.35 in sphere/cylindrical group and 0.29± 0.5928.1% (9/32) in ellipsoidai group with statistical difference. Conclusions LASIK using the LaserSight SLX excimer laser (5.3 software) in standard sphere/cylindrical or custom ellipsoidal ablation model is effective and stable for moderate and high compound myopic astigmatism. The postoperative Q-value in ellipsoidal ablation model is easier to maintain preoperatively negative characteristic.