PRK围手术期的眼压观察

TX Observations on intraocular pressure in the stage around photorefractive keratectomy

为研究准分子激光角膜切削术（ＰＲＫ）围手术期的眼压变化规律、变化原因和皮质类固醇对眼压的影响，应用非接触式眼压计（ＮＣＴ）在ＰＲＫ术前、术后３天、６天、１０天及１月时对高度近视组（４７只眼）和中低度近视组（３４只眼）分别进行眼压测量。结果：平均眼压在术后６天内呈下降趋势，高度近视组下降了１．１６ｋＰａ，中低度近视组下降了０．８７ｋＰａ，术后６天至术后１月呈上升趋势，高度近视组上升了０．４０ｋＰａ。中低度近视组上升了０．２９ｋＰａ。结论：围手术期眼压有波动过程，术后角膜表面变平、角膜水肿和皮质类固醇的应用参与影响眼压的变化。判断皮质类固醇对眼压的影响需根据术后眼压的变化量及术前眼压。

o investigate the effectiveness of corticosteriod,regularity and cause of intraocular pressure(IOP) change in the stage around photorefractive keratectomy(PRK).Methods To divide the myopic patients into two groups according to dioptors:high myopia group(>60D)47 eyes,moderate & low myopia group(≤60D)34 eyes.IOP was measured with noncontact tonometer(NCT) before operation,at 3,6,10 days and 1 month after operation.Results Average IOP shows a tendency to drop within 6 days after operation,High myopia group dropped 116kPa,moderate & low myopia group dropped 087kPa;Average IOP shows a tendency to increase from 6days to 1 month after operation.There is 040kPa variable in high myopia group and 029kPa in the other group.Conclusion There is fluctuation of IOP in the stage around PRK,which may be caused by flattening of cornea,swelling of cornea and application of corticosteriod.The effectiveness of corticosteriod should be evaluated according to the value of IOP before operation and the variable of IOP after operation.It is necessary to observe IOP of high myopia closely.