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目的 :探讨准分子激光角膜切削术 (photorefractivekeratectomy ,PRK)后角膜上皮下混浊 (Haze)与术前眼总屈光度之间的关系。方法 :将接受PRK手术患者近视和散光的总屈光度分成低度 (- 1.0 0～ - 3.0 0D)、中度 (- 3.2 5～ - 8.0 0D)、高度 (- 8.2 5～ - 16 .0 0D以上 )三组 ,同时对高度组中的角膜水化与非角膜水化进行统计 ,比较术后角膜Haze形成情况。结果 :低度组和中、高度组比较发生角膜Haze的程度差异有显著性 (P <0 .0 1) ,而中度组和高度组比较差异无显著性 (P >0 .0 5 ) ,术中角膜水化组与非水化组发生角膜Haze比较具有显著性差异 (P <0 .0 5 )。结论 :PRK术后Haze形成与术前治疗总屈光度之间没有正相关系 ,术后科学有效地使用皮质类固醇激素和辅助用药以及对高度近视眼治疗过程中进行角膜水化作用是减少Haze形成的有效方法。
Objective: To investigate the relationship between corneal subcutaneous haze (Haze) and total preoperative refractive power after photorefractive keratectomy (PRK). Methods: The total refraction of myopia and astigmatism in patients undergoing PRK surgery was divided into three groups: low (1.0 ~ 3.0.0D), moderate (-3.25 ~ - 8.00D), high (8.2-2.16 ~ ) Three groups, while the height of corneal hydration and non-corneal hydration statistics, postoperative corneal Haze formation. Results: There was significant difference in the degree of corneal Haze between the low and middle groups (P <0.01), but there was no significant difference between the moderate and high groups (P> 0.05) There was a significant difference in corneal Haze between intraoperative corneal hydration group and non-hydration group (P <0.05). CONCLUSIONS: There is no positive correlation between the postoperative Haze formation and the preoperative total refraction after PRK surgery. The postoperative scientifically effective use of corticosteroids and adjuvant medications and the corneal hydration during high myopia treatment reduce the Haze formation Useful ways.