准分子激光屈光性角膜切削术后角膜地形图岛状隆起

Observation of the formation of island on corneal topography after photorefractive keratectomy

目的 探讨准分子激光屈光性角膜切削术 (PRK)后角膜地形图出现岛状隆起与患者各种因素的关系。方法 对连续 333例 (5 92只眼 )接受PRK治疗病人术后 6个月的角膜地形图进行回顾性分析 ,将地形图中出现中央岛 ,半岛 ,双峰岛的资料进行比较。结果 双眼出现岛状隆起的比例高于单眼。术后 1～ 3月岛状隆起明显且有不断增加的现象 ,6月时 5 2 6 3 %的岛状隆起消失。岛状隆起与角膜雾浊无关 ;双峰岛的隆起度较高 ,可导致散光 ,对术后最佳矫正视力有一定的影响。结论 PRK术后地形图岛状隆起的形成可能是部分个体特殊的术后反应过程。

ObjectiveTo investigate the relationship between the formation of island elevation on corneal topography after photorefractive keratectomy(PRK) with the factors of patients.MethodsThe island elevation of 592 eyes of consecutive 333 patients’ corneal topographies from 1 to 6 months after PRK were reviewed.The data about the formation of central island,peninsula island and double peak island were analysed.ResultsThe occurrence rate of island elevation on double eyes was more than that of simple eyes.Island elevations appeared on the topographies at 1 to 3 months,and the diopters of 33.9% island elevation became higher and higher.52 63% island elevation disappeared at 6 months.There was no relationship between elevation and haze at 1 to 3 months.Double peak island elevation showed more astigmatism which reduced the best corrected visual acuity after operation.ConclusionThe formation of island elevation after PRK is a special reaction process in some patients.