中低度近视准分子激光屈光性角膜切削术后眼压测量值波动范围的预测

目的：预测准分子激光屈光性角膜切削术（PRK）后个体眼压测量值的波动范围。方法：测量中低度近视行PRK手术的383眼术前及术后1年的眼压。利用回归方程对术后个体眼压测量值的波动范围进行预测。结果：术后1年和术后眼压测量值明显相关，对于一个给定的术前眼压X0（mmHg），其术后眼压测量值95％容许区间为0.5X0－0.1，0.5X0＋6.3（mmHg）。结论：可以根据术前眼压，对中低度近视PRK术后个体眼压测量值的波动范围进行预测。

Prediction of thefluctuating intervals of intraocular pressure readings in mild and medium myopia afterphotorefractive keratectomy

ObjectiveTo predict the fluctuating intervals of intraocular pressure readings in mild and medium myopia after photorefractive keratectomy（PRK）．MethodsThe intraocular pressure（IOP）readings of 383 eyes，of which spherical equivalent were less than-6.0 diopters（D）before and over 1 a after PRK，were measured with noncontact tonometer（NCT）．The IOP data were analyzed with paired-sample t test，linear correlation and regression．Regression equation was used to predict the fluctuating intervals of IOP readings after PRK．ResultsThe IOP readings after PRK（10.38±2.08）mmHg were lower than those before PRK（15.43±2.74）mmHg．The difference of IOP readings between before and 1 a after PRK was significant （P＜0.001）．The postoperative IOP readings were related to those of preoperation （r＝0.625，P＜0.001）and the regression equation was Y＝0.474X＋3.064［X＝IOP reading before PRK（mmHg），Y＝IOP reading followed over 1 a after PRK（mmHg）］．If IOP reading before PRK was X0，the 95％ tolerant interval of IOP readings followed over 1 a after PRK was 0.5X0-0.1，0.5X0＋6.3（mmHg）．ConclusionIOP readings before PRK can be used to predict the fluctuating intervals of IOP readings in mild and medium myopia after PRK．