Department of Ophthalmology, College of Medicine, Qassim University, Buraidah, Saudi Arabia.
Middle East Afr J Ophthalmol. 2023 May 25;29(3):127-131. doi: 10.4103/meajo.meajo_156_22. eCollection 2022 Jul-Sep.
The influence of central corneal thickness (CCT) on intraocular pressure (IOP) measurement by Diaton is debatable. We present a correlation of CCT to transpalpebral IOP (tpIOP) and its determinants in patients undergoing transepithelial photorefractive keratectomy (TPRK) in Saudi Arabia.
In this cross-sectional study held in 2022, the IOP of patients undergoing TPRK was measured by Diaton tonometer. The CCT was measured before and 1 week after refractive surgery. The correlation coefficient of CCT and IOP and its Pearson value were estimated. The effects of gender, type of refractive error (RE), and corneal epithelial thickness (CET) on the correlation of IOP to CCT were reviewed.
We studied 202 eyes in 101 patients (Male: Female, 47:53; age 25.7 ± 5.8 years). The tpIOP was 15.1 ± 2.8 mmHg before, 15.9 ± 2.8 mmHg 1 week after, and 15.7 ± 4.1 mmHg 1 month after TPRK. The CCT was significantly correlated with tpIOP before surgery (Pearson correlation 0.168, = 0.017) and after tPRK (Pearson correlation 0.246, < 0.001). Gender ( = 0.96), CET ( = 0.43), and type of RE ( = 0.99) were not significant determinants of correlation between CCT and tpIOP before TPRK. The correlation of tpIOP and CCT was not affected by gender ( = 0.07), CET ( = 0.39), and type of RE ( = 0.13).
CCT should be considered before interpreting tpIOP measured by with Diaton. Diaton could be a useful tool to monitor IOP changes in young patients undergoing refractive surgery.
Diaton 测量的中央角膜厚度（CCT）对眼压（IOP）的影响存在争议。我们呈现了沙特阿拉伯行经上皮准分子激光角膜切削术（TPRK）患者的 CCT 与经巩膜眼压（tpIOP）及其决定因素的相关性。
在 2022 年进行的这项横断面研究中，使用 Diaton 眼压计测量接受 TPRK 手术的患者的 IOP。在屈光手术后 1 周前和 1 周后测量 CCT。估计 CCT 与 IOP 的相关系数及其 Pearson 值。回顾了性别、屈光不正类型（RE）和角膜上皮厚度（CET）对 IOP 与 CCT 相关性的影响。
我们研究了 101 名患者的 202 只眼（男：女，47:53；年龄 25.7±5.8 岁）。术前 tpIOP 为 15.1±2.8mmHg，术后 1 周为 15.9±2.8mmHg，术后 1 个月为 15.7±4.1mmHg。CCT 与术前手术时的 tpIOP 显著相关（Pearson 相关系数 0.168， = 0.017），与 tPRK 后也显著相关（Pearson 相关系数 0.246， < 0.001）。性别（ = 0.96）、CET（ = 0.43）和 RE 类型（ = 0.99）不是 TPRK 前 CCT 与 tpIOP 之间相关性的显著决定因素。tpIOP 和 CCT 之间的相关性不受性别（ = 0.07）、CET（ = 0.39）和 RE 类型（ = 0.13）的影响。
在解释 Diaton 测量的 tpIOP 时，应考虑 CCT。Diaton 可能是监测接受屈光手术的年轻患者 IOP 变化的有用工具。
