Ağca Alper, Demirok Ahmet, Cankaya Kadir İ, Yaşa Dilek, Demircan Ali, Yildirim Yusuf, Ozkaya Abdullah, Yilmaz Omer F
Beyoglu Eye Research and Training Hospital, Istanbul, Turkey.
Beyoglu Eye Research and Training Hospital, Istanbul, Turkey.
Cont Lens Anterior Eye. 2014 Aug;37(4):292-6. doi: 10.1016/j.clae.2014.03.001. Epub 2014 Mar 27.
To compare postoperative visual acuity and higher-order aberrations (HOAs) after femtosecond lenticule extraction (FLEX) and after small-incision lenticule extraction (SMILE).
Medical records of refractive lenticule extraction patients were retrospectively reviewed. Twenty patients were treated with FLEX. A comparable group of 20 SMILE patients were retrospectively identified. Only one eye of each patient was randomly chosen for the study. Visual acuity, subjective manifest refraction and corneal topography before and 6 months after the surgery were analyzed for both groups. Total HOAs, spherical aberrations, coma and trefoil were calculated from topography data over the 4- and 6-mm-diameter central corneal zone.
The mean preoperative SE was -4.03 ± 1.61 in the SMILE group and -4.46 ± 1.61 in the FLEX group. One year after surgery, the mean SE was -0.33 ± 0.25 in the SMILE group and -0.31 ± 0.41 in the FLEX group (p=0.86). In the SMILE group a greater number of eyes were within ±0.50D of the target refraction (95% versus 75%); however, the difference was not statistically significant (p=0.18). Furthermore, 80% of FLEX eyes and 95% of SMILE eyes had an uncorrected distance visual acuity of 20/25 or better (p=0.34). Total HOAs, spherical aberration, coma and trefoil increased postoperatively in both groups. However, there was no statistically significant difference between the groups preoperatively and postoperatively.
FLEX and SMILE result in comparable refractive results. In addition, corneal aberrations induced by different techniques of lenticule extraction seemed similar to each other.
比较飞秒透镜切除术（FLEX）和小切口透镜切除术（SMILE）术后的视力和高阶像差（HOA）。
对屈光性透镜切除术患者的病历进行回顾性分析。20例患者接受了FLEX治疗。回顾性确定了20例SMILE患者作为可比组。每位患者仅随机选择一只眼进行研究。分析两组患者手术前和手术后6个月的视力、主观验光和角膜地形图。通过4毫米和6毫米直径的中央角膜区域的地形图数据计算总HOA、球差、彗差和三叶草像差。
SMILE组术前平均等效球镜度（SE）为-4.03±1.61，FLEX组为-4.46±1.61。术后一年，SMILE组平均SE为-0.33±0.25，FLEX组为-0.31±0.41（p = 0.86）。SMILE组更多的眼睛在目标屈光度±0.50D范围内（95%对75%）；然而，差异无统计学意义（p = 0.18）。此外，80%的FLEX眼和95%的SMILE眼的未矫正远视力为20/25或更好（p = 0.34）。两组术后总HOA、球差、彗差和三叶草像差均增加。然而，两组术前和术后均无统计学显著差异。
FLEX和SMILE的屈光结果相当。此外，不同透镜切除术技术引起的角膜像差似乎彼此相似。
