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The Difference in Intraocular Pressure before and after Visual Field Test Measured by Rebound Tonometer
리바운드안압계를 이용하여 측정한 시야검사 전후 안압 차이
JKOS 2020 Jan;61(1):78-85
Published online January 15, 2020;  https://doi.org/10.3341/jkos.2020.61.1.78
Copyright © 2020 The Korean Ophthalmological Society.
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Joong Hyun Park, MD1, Jin Young Kim, MD1, Eun Kyoung Lee, MD2, Hye Jin Lee, MD1, Jin Ho Jeong, MD1, Sang-Yoon Lee, MD1
박중현1 · 김진영1 · 이은경2 · 이혜진1 · 정진호1 · 이상윤1

Department of Ophthalmology, Jeju National University Hospital, Jeju National University School of Medicine1, Jeju, Korea
Department of Ophthalmology, Seoul National University Hospital, Seoul National University College of Medicine2, Seoul, Korea
제주대학교 의학전문대학원 제주대학교병원 안과학교실1, 서울대학교 의과대학 서울대학교병원 안과학교실2
Received June 28, 2019; Revised September 6, 2019; Accepted December 30, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Purpose: To investigate the effect of a visual field (VF) test on intraocular pressure (IOP) and relevant parameters in a normal group and an open-angle glaucoma group, and to determine the appropriate time of IOP measurements.
Methods: The IOP was measured by a rebound tonometer before and after a VF test for the normal, normal-tension glaucoma, and high-tension glaucoma groups, and IOP differences after the VF tests were compared among groups. Parameters including age, sex, axial length, central corneal thickness, IOP before the VF test, the VF index, mean deviation, VF test duration, and usage of IOP lowering medications were investigated, and the correlations of these parameters with IOP changes after VF tests were determined using linear regression analyses.
Results: A total of 232 participants (232 eyes) included 55 normal subjects, 131 normal-tension glaucoma patients, and 46 high-tension glaucoma patients. The IOP differences after VF tests were not statistically significant in the normal and high-tension glaucoma groups, and the difference was 0.31 mmHg in the normal-tension glaucoma group (p = 0.013). Multivariate regression analyses revealed that axial length (p = 0.005) and IOP before the VF test (p < 0.001) were relevant factors in the total number of patients, and the axial length (p = 0.017), IOP before the VF test (p = 0.001), and duration (p = 0.029) were found to be significantly associated with IOP differences in the normal-tension glaucoma group.
Conclusions: The IOP changes after VF tests using the rebound tonometer were significant in the normal-tension glaucoma group, but were within an acceptable range. The IOP value measured after a VF test is clinically valid in clinical practice.
Keywords : Intraocular pressure, Normal tension glaucoma, Rebound tonometer, Visual field test

 

February 2020, 61 (2)