论文部分内容阅读
目的 了解准分子激光治疗性切削 (PTK)联合屈光性切削 (PRK)治疗伴有角膜混浊近视眼的方法及疗效。方法 激光加刮除去除角膜上皮 ,PTK切削混浊角膜 ,直径为 7 0mm。PRK作近视切削 ,直径为 6 0mm。对于角膜不平者术中用黏弹剂填平后再行上皮去除及PTK。PTK切削深度为影响视力的角膜混浊深度减去PRK及上皮切削厚度。结果 5 4例 (79只眼 )伴有角膜混浊的近视眼治疗后随访 1年以上 ,术前平均屈光度数为 (- 6 73± 4 17)D ,平均最佳矫正视力为 0 6 3,角膜混浊原因包括感染、机械外伤、化学烧伤、热烧伤、手术后瘢痕及其他原因。术中PTK联合PRK平均切削深度为 (12 4 6 3± 5 3 31) μm。术后 5 0只眼 (6 3 3% )切削区角膜上皮下雾状混浊 (Haze)≤Ⅰ级 ,6 9只眼(89 9% )裸眼视力等于或超过术前最佳矫正视力 ,平均为 0 74。角膜表面较术前光滑 ,散光减轻。结论 PTK联合PRK是治疗伴有角膜混浊近视眼的一种安全有效的方法。
Objective To investigate the methods and efficacy of excimer laser photocoagulation (PTK) and refractive kyphoplasty (PRK) in the treatment of corneal opacity myopia. Methods Laser plus curettage to remove corneal epithelium, PTK cut cornea, diameter 70mm. PRK for myopia cutting, diameter 60mm. For those with corneal uneven surgery with viscoelastic filling and then remove the epithelium and PTK. Depth of PTK Depth is the depth of corneal opacity that affects vision minus PRK and epithelial thickness. Results Fifty-four cases (79 eyes) with corneal opacity were followed up for more than 1 year. The average preoperative refractive power was (-6 73 ± 4 17) D, the average best corrected visual acuity was 0 6 3. The cornea Causes of opacity include infection, mechanical trauma, chemical burns, thermal burns, postoperative scarring, and other causes. Intraoperative PTK combined PRK average depth of cut was (12 4 6 3 ± 5 3 31) μm. The corneal submucosal haze≤Ⅰ, 69 eyes (89.9%) had uncorrected visual acuity equal to or better than the preoperative best corrected visual acuity (averaged 0 74. Corneal surface than preoperative smooth, reduce astigmatism. Conclusions PTK combined with PRK is a safe and effective method for treatment of myopic corneal opacity.