Objective To evaluate the efficacy of sub-Bowman′s keratomileusis (SBK) surgery performed by Winsight excimer laser ablation for the treatment of myopia, to evaluate the predictability, safety and quality of vision using this procedure. Methods This was a retrospective case-control study. One hundred fifty-six eyes of 78 cases that had undergone SBK for myopia were analyzed retrospectively. Half of the eyes were treated with Winsight and half with Allegretto Eye-Q. Primary outcome variables, including uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), and manifest refraction spherical equivalent (SE), were evaluated at 1 week and 1, 3 and 6 months postoperatively. Dark room and dark room glare contrast sensitivity were evaluated at 1, 3 and 6 months postoperatively in the test group. Data were analyzed using independent t test and ANOVA. Results There were no significant differences in postoperative UCVA and SE between the test and control groups. At 1, 3 and 6 months, the respective proportions of eyes achieving postoperative SE within ±0.5 D were 97%, 97% and 97% for the test group and 96%, 99% and 99% for the control group. UCVA was 5.0 or better in 100%, 100% and 99% of eyes in the test group. At 1, 3 and 6 months postoperatively, the mean efficacy index was 1.01±0.01 for both the test and control groups (t=1.551, 0.796, 1.662, P>0.05). In the test group, no eyes had lost more than 2 lines of BCVA at 1, 3 and 6 months postoperatively. The mean safety indices were 1.02±0.01, 1.01±0.01 and 1.01±0.01. Although dark room and dark room glare contrast sensitivity fluctuated mildly after SBK, the measurements did not decline significantly. Compared with preoperative data, dark room contrast sensitivity at 3 months increased to 12 c/d (F=15.31, P<0.05). Conclusion SBK performed by Winsight excimer laser is a predictable, effective and safe procedure for myopia and astigmatism.
孙明甡,张丰菊,张丽,柳静,张晶,张秋露,郭宁,翟长斌. 采用Winsight准分子激光治疗系统行SBK术矫正近视及散光的疗效评价[J]. 中华眼视光学与视觉科学杂志, 2014, 16(1): 5-9.
Sun Mingshen,Zhang Fengju,Zhang Li,Liu Jing,Zhang Jing,Zhang Qiulu,Guo Ning,Zhai Changbin. Analysis on the efficacy of SBK surgery for myopia and astigmatism performed by Winsight excimer laser ablation. Chinese Journal of Optometry Ophthalmology and Visual Science, 2014, 16(1): 5-9. DOI: 10.3760/cma.j.issn.1674-845X.2014.01.002
Condon PI, O′Keefe M, Binder PS. Long-term results of laser in situ keratomileusis for high myopia: risk for ectasia[J]. J Cataract Refract Surg,2007,33:583-590.
[2]
Zhang F, Deng S, Guo N, et al. Confocal comparison of corneal nerve regeneration and keratocyte reaction between FS-LASIK, OUP-SBK, and conventional LASIK[J]. Invest Ophthalmol Vis Sci,2012,53:5536-5544.
[3]
Slade SG, Durrie DS, Binder PS. A prospective, contralateral eye study comparing thin-flap LASIK (sub-Bowman keratomileusis) with photorefractive keratectomy[J]. Ophthalmology,2009,116:1075-1082.
Han DC, Chen J, Htoon HM, et al. Comparison of outcomes of conventional WaveLight Allegretto Wave and Technolas excimer lasers in myopic laser in situ keratomileusis[J]. Clin Ophthalmol,2012,6:1159-1168.
[6]
Gazieva L, Beer MH, Nielsen K, et al. A retrospective comparison of efficacy and safety of 680 consecutive lasik treatments for high myopia performed with two generations of flying-spot excimer lasers[J]. Acta Ophthalmol,2011,89:729-733.
[7]
Wu L, Zhou X, Ouyang Z, et al. Topography-guided treatment of decentered laser ablation using LaserSight′s excimer laser[J]. Eur J Ophthalmol,2008,18:708-715.
[8]
Dougherty PJ, Wellish KL, Maloney RK. Excimer laser ablation rate and corneal hydration[J]. Am J Ophthalmol,1994,118:169-176.
[9]
Lorente-Velázquez A, Nieto-Bona A, Collar CV, et al. Intraocular straylight and contrast sensitivity (1/2) and 6 months after laser in situ keratomileusis[J]. Eye Contact Lens,2010,36:152-155.
[10]
Hatch BB, Moshirfar M, Ollerton AJ, et al. A prospective, contralateral comparison of photorefractive keratectomy (PRK) versus thin-flap LASIK: assessment of visual function[J]. Clin Ophthalmol,2011,5:451-457.