PRK与LASIK术后角膜表面形态改变对NCT眼压读数的影响  

A primary study on the factors for NCT intraocular pressure readings after PRK and LASIK

作　　者：宋跃[1] 张辉[1] 孙同[1] 

机构地区：[1]白求恩医科大学第二临床学院眼科

出　　处：《眼科》1998年第4期197-199,共3页Ophthalmology in China

摘　　要：目的：探讨ＰＲＫ和ＬＡＳＩＫ术后眼压明显低于术前的相关因素。方法：对不同屈光度患者８０４只眼术前、术后的眼压、角膜厚度及切削深度，应用统计学方法检验对眼压测量的影响。结果：角膜厚度随屈光度增加而变薄，术前眼压与屈光度和角膜厚度无关，所有患者术后６个月眼压明显低于术前，且高度近视组低于中低度组，有显著性差异（Ｐ＜０．０１）。结论：患者术后眼压降低的原因可能主要由于手术导致角膜中央变薄，前弹力层被破坏，使角膜形态学改变，由此引发气体动力学的变化，使得气体压平眼压计读数发生误差，眼压值变低。故应对气体眼压计读数进行修定，防止屈光性手术后激素性青光眼的漏诊造成的视功能损害。To explore the factors for the actual IOP readings of the patients after PRK and LASIK,the data of intraocular pressure,refraction,corneal thickness preoperatively and postoperatively as well as the depth of laser keratectomy from the patients with low,medium and high myopia were analyzed statistically.IOP readings of the patients after PRK and LASIK were significantly lower than those preoperatively.Postoperatively IOP readings in high myopia group was lower than those in medium and lower group;There was no corelation between IOP and corneal thickness or refraction of myopic patients before PRK and LASIK,though the corneal thickness became thinner with the progression of myopia. The lower postoperative IOP readings may be mainly due to refraction and corneal surface morphological changes,which could induce the physical changes of air dynamics of the non contact tonometer leading to IOP reading deviations from the right.So the IOP readings of the patients after PRK and LASIK should be corrected in order to avoid missing the diagnosis of glaucoma.

关 键 词：近视 PRK LASIK 眼压 角膜表面形态 病理生理学 

分 类 号：R778.11[医药卫生—眼科] R779.6[医药卫生—临床医学]