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为探讨准分子激光角膜切削术（ｐｈｏｔｏｒｅｆｒａｃｔｉｖｅｋｅｒａｔｅｃｔｏｍｙ，ＰＲＫ）后角膜上皮下雾状混浊（ｈａｚｅ）的原因及影响因素，对ＰＲＫ后６个月时屈光度在－１．００～－１８．５０Ｄ的３１６例（６１５只眼）近视眼的ｈａｚｅ相关因素进行观察和比较。结果：ＰＲＫ后６个月时ｈａｚｅ发生率为４４．７％，１级或以上ｈａｚｅ为１３．３％。ｈａｚｅ的发生率及密度随屈光度增高而增加（Ｐ＜０．０００１），也随切削深度的增加而增加（Ｐ＜０．０００１），术前非接触眼压超过１８ｍｍＨｇ者，ｈａｚｅ的发生率和密度增加（Ｐ＜０．００５），男性较易发生ｈａｚｅ（Ｐ＝０．０００１），与年龄呈负相关（Ｐ＜０．０５）。而角膜厚度、术前戴用接触镜及散光对ｈａｚｅ的影响不显著。结论：高度近视（＞－６．０Ｄ）和过深的切削（＞８０μｍ）是引起ｈａｚｅ的主要原因。术前眼压偏高、年龄偏低对ｈａｚｅ也有明显影响。对ＰＲＫ治疗高度近视应持审
To investigate the causes and influencing factors of corneal haze after corneal laser photocoagulation (PRK), 316 patients with refraction of -1.00 ~ -18.50D at 6 months after PRK (615 eyes) myopia haze related factors were observed and compared. Results: The incidence of haze was 44.7% at 6 months after PRK and 13.3% at grade 1 or above. The incidence and density of haze increased with increasing diopter (P <0.0001), but also with increasing depth of cut (P <0.0001), preoperative non-contact intraocular pressure more than 18mmHg, the incidence of haze and The density was increased (P <0.005), haze was more likely to occur in males (P = 0.0001), and negatively correlated with age (P <0.05). The corneal thickness, preoperative wear contact lenses and astigmatism haze no significant effect. Conclusion: High myopia (> -6.0D) and deep cuts (> 80μm) are the main causes of haze. Preoperative high intraocular pressure, low age haze also have a significant impact. PRK treatment of high myopia should be tried