Refractive Surgical Department, Armed Forces Institute of Ophthalmology (AFIO), National University of Medical Sciences, Rawalpindi, Pakistan.
Department of Eye, Mazhar Ishaq Centre of Ophthalmology, Rawalpindi, Pakistan.
J Coll Physicians Surg Pak. 2023 Oct;33(10):1148-1152. doi: 10.29271/jcpsp.2023.10.1148.
To assess the variation in intraocular pressure measurements between Ocular Response Analyzer (ORA) and Goldmann Applanation Tonometer (GAT) in myopic patients undergoing laser assisted in-situ keratomileusis (LASIK) and photorefractive keratectomy (PRK).
Quasi-experimental study. Place and Duration of the Study: Armed Forces Institute of Ophthalmology (AFIO), National University of Medical Sciences, Rawalpindi, Pakistan, between September 2020 and 2021.
Myopic patients undergoing LASIK and PRK during the study period were selected. Baseline examinations and postoperative follow-ups were carried out to measure intraocular pressure at 1, 3, and 6 months after LASIK or PRK, using Goldmann Applanation Tonometer (GAT) and Ocular Response Analyzer, corneal compensated IOP (ORA IOPcc).
One hundred and thirteen eyes underwent myopic refractive surgery, LASIK (n = 60) or PRK (n = 53). Mean age of patients was 23.6 ± 4.11 years in the PRK group and 24.4 ± 5.94 years in LASIK group. For the PKR group, the GAT IOP value increased at 1-month (p <0.001), decreased at 3-month (p <0.001) and further decreased at 6-month (p <0.001) follow-up postoperatively. In the LASIK group, the GAT IOP value decreased at all time points (p <0.001). In both groups, the mean ORA IOPcc value increased at 1 month (p <0.001), decreased at 3-month (p <0.001) and further decreased at 6-month (p <0.001) follow-up postoperatively. The IOP mean values were generally found to be higher when measured using ORA as compared with GAT.
Corneal refractive surgery markedly decreased IOP. This decrease in IOP was observed more after LASIK than after PRK. ORA was less likely to underestimate the intraocular pressure than GAT.
Myopia, Laser in-situ keratomileusis, Photorefractive keratectomy, Tonometery ocular, Intraocular pressure.
评估在接受激光辅助原位角膜磨镶术（LASIK）和光折射性角膜切除术（PRK）的近视患者中，眼反应分析仪（ORA）和压平眼压计（GAT）测量的眼压之间的变化。
准实验研究。研究地点和时间：巴基斯坦拉瓦尔品第的武装部队眼科研究所（AFIO），国家医科大学，2020 年 9 月至 2021 年。
选择在研究期间接受 LASIK 和 PRK 的近视患者。进行基线检查和术后随访，使用 Goldmann Applanation Tonometer（GAT）和角膜补偿眼压（ORA IOPcc）在 LASIK 或 PRK 后 1、3 和 6 个月测量眼压。
113 只眼接受了近视屈光手术，LASIK（n = 60）或 PRK（n = 53）。PRK 组患者的平均年龄为 23.6 ± 4.11 岁，LASIK 组为 24.4 ± 5.94 岁。对于 PRK 组，GAT IOP 值在术后 1 个月时升高（p <0.001），在术后 3 个月时降低（p <0.001），在术后 6 个月时进一步降低（p <0.001）。LASIK 组在所有时间点 GAT IOP 值均降低（p <0.001）。在两组中，ORA IOPcc 的平均眼压值在术后 1 个月时升高（p <0.001），在术后 3 个月时降低（p <0.001），在术后 6 个月时进一步降低（p <0.001）。使用 ORA 测量时，眼压平均值通常比使用 GAT 测量时更高。
角膜屈光手术显著降低了眼压。这种眼压下降在 LASIK 后比在 PRK 后更明显。ORA 比 GAT 更不可能低估眼压。
近视，激光原位角膜磨镶术，光折射性角膜切除术，眼压计，眼压。
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