Pentacam眼前节分析系眼压值校正中应用统在Epi—LASIK术后眼压值校正中应用

Application of Pentacam system in correction of intraocular pressure after Epi-LASIK

目的评价Pentacam眼前节分析系统的5种眼压校正方法对Epi-LASIK术后眼压测量值的校正准确性。方法临床病例系列研究。对2009年1-12月在延边眼耳鼻喉科医院眼科行Epi-LASIK手术62例（124只眼）患者，在术前与术后12个月采用Pentacam仪测定角膜中央厚度和角膜曲率，采用Goldmann压平眼压计测量眼压，将测量值输入到Pentacam系统的5种眼压校正方法中进行校正。结果Epi-LASIK术前、术后采用Goldmann压平眼压计测量的眼压分别是（15.75±2.24）mmHg、（10.72±2.31）mmHg，差异具有统计学意义（t=4.715，P〈0.01）。5种校正方法中Ehlers法的校正值术前与术后之间比较，差异无统计学意义（t=1.223，P=0.228）；Ehlers法的术后校正值与术前Goldmann压平眼压计测量值之间比较，差异无统计学意义（t=0.827，P=0.413）。结论Pentacam系统的5种校正方法中，Ehlers法较其他4种方法提供一个更为接近实际的术后眼压，可作为Epi-LASIK术后Pentacam系统校正眼压方法中的首选。

Objective To evaluate the accuracy of Pentacam built-in5 intraocular pressure （IOP） correction programs used to measure the IOP of patients who received Epi-LASIK. Methods Central corneal thickness and corneal curvature of 124 eyes from 62 patients who underwent epipolis laser in situ keratomileusis in Yanbian Eye Ear Nose and Throat Hospital from January to Decem- ber 2009 was measured with Pentacam before and 12 months after operation. Goldmann applanation tonometry （GAT） was used to measure their IOP. The collected data was input to Pentacam, and was calculated by 5 correction programs. Results The GAT-based pre- and post-operative IOP was （15.75±2.24）mmHg, and （10.72±2.31）mmHg, respectively, revealing the post-operative IOP to be significantly lower than the pre-operative IOP （t =4.715, P 〈0.001）. Among the 5 correction programs within Pentacam, Ehlers program showed little difference between pre- and post- operative IOP val- ues （t =1.223, P =0.228） and the post-operative correction value showed no significant difference with the pre-operative GAT value （t =0.827, P =0.413）. Conclusions Among the five correction methods of Pentacam system, Ehlers method provides a more real lOP than the other four methods. It can be used as the first choice for pentacam to correct lOP after Epi-LASIK.