准分子激光角膜内成形术治疗远视

Laser in Situ Keratomileusis for Hyperopia

目的研究探讨准分子激光角膜内成形术（laserinsitukeratomileusis，LASIK）治疗远视的手术疗效和角膜形态学变化。方法应用KOHERENTSCHWINDKERATOM－2型准分子激光治疗机和SCMD显微角膜板层切开刀对9眼行远视性LASIK治疗，对手术前、后视力和角膜地形图数值变化进行对比分析。结果术前最佳矫正视力为0．76±0．26，术后1天裸眼视力0．42±0．14，术后1月0．52±0.27，术后半年0．61±0．20，角膜地形图示Simk及散光度变化与临床相符，SAI、SRI、PVA则轻度增高。结论LASIK治疗远视有确切疗效，其视力恢复呈缓慢提高过程，手术效应的稳定性较好，无雾状混浊发生和明显的屈光回退。但目前显微角膜板层切开刀的操作可靠性和治疗软件还需进一步完善，以提高手术的安全性和精确性。

Objection To evaluate efficacy and change in corneal morphology with laser in situ keratomileusis for hyperopia (H - LASIK). Methods 9 eyes were treated by H - LASIK with KOHERENT SCHWIND KERATOM - type2 and SCMD miceokeratom, analyzing change of visual acuity and parameters of topography preoperatively and postoperatively. Kesults The preop erative best corrected visual acuity (BCVA) was 0. 76 ±0. 26 ;the uncorrected visual acuity was 0. 42 ±0. 14, 0. 52±0. 27, 0. 61±0. 20 at one day, one month and at six monthes postoperatively respectively.the topography showed that sim-k and change of astigmatism were accordant with practical findings; SAI,SRI and PVA were increased slightly.Conclusions Efficacy and stability were confirmed in H - LASIK, in which the postoperative visual acuity was improved increasing slowly and there were no haze and obvious refractive regression.To improve the safety and precision of this operation, the reliability,of this operation with microkeratome recently and treatment software are still in heed of being further improved.