Short-Term Effect of Standard Automated Perimetry Testing on Intraocular Pressure in Patients with Open-Angle Glaucoma

Chang Mok Lee,Young Cheol Yoo

doi:10.1155/2013/956504

Chang Mok Lee, Young Cheol Yoo

Open Access

https://doi.org/10.1155/2013/956504

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Journal: ISRN Ophthalmology	Publication Date: Feb 14, 2013
Citations: 23	License type: CC BY 3.0

Affiliation: Kangdong Sacred Heart Hospital

Abstract

Purpose. To evaluate the short-term effect of standard automated perimetry (SAP) testing on intraocular pressure (IOP) in patients with open-angle glaucoma (OAG). Methods. We tested 45 patients (71 eyes) with OAG that had stable IOP under medical treatment. IOP was measured four times using an iCare rebound tonometer (RBT) immediately before, immediately after, 10 minutes after, and 20 minutes after SAP testing. Logistic regression analyses were performed to determine the relationships among SAP test duration, mean deviation of the SAP result, type of glaucoma medications, patient age, and significant IOP change (exceeding 2 mmHg) from baseline IOP. Results. The mean baseline IOP was 13.29 ± 3.06 mmHg. Although IOP changes immediately and 20 minutes after SAP testing were not statistically significant, the IOP change 10 minutes after SAP testing (−0.57 ± 1.84 mmHg) was statistically significant. However, the changes were within the margin of error of the RBT. Test duration, mean deviation, patient age, and type of glaucoma medications did not have a significant influence on IOP change (all P > 0.14). Conclusions. IOP measured by RBT did not vary significantly after SAP testing in patients with OAG. It may be not necessary to reject IOP measured after SAP testing in patients with OAG.

Highlights

Intraocular pressure (IOP) remains the only treatable risk factor for the management of glaucoma
One prospective study reported that IOP varied significantly and tended to increase immediately after standard automated perimetry (SAP) testing in patients with primary openangle glaucoma (POAG), but other studies have reported no significant difference [3,4,5]
To minimize measurement errors and adverse effects caused by topical anesthesia and repeated corneal applanation by Goldmann applanation tonometry (GAT), we designed a prospective study using the iCare rebound tonometry (RBT) which does not require anesthesia or corneal applanation to measure IOP

Summary

Introduction

Intraocular pressure (IOP) remains the only treatable risk factor for the management of glaucoma. Repeated IOP measurement and standard automated perimetry (SAP) testing are simple but fundamental procedures used to assess the stage of progression and to determine adequate treatment for patients with glaucoma [1, 2]. On a daily basis in our practice, IOP is measured after SAP testing. Afterward, both the SAP results and IOP are discussed with the patients, and their treatment strategies for glaucoma may be adjusted. One prospective study reported that IOP varied significantly and tended to increase immediately after SAP testing in patients with primary openangle glaucoma (POAG), but other studies have reported no significant difference [3,4,5]. The aim of the present study was to evaluate the short-term effects of SAP testing on IOP measurement in patients with open angle glaucoma (OAG). To determine if there is a specific time after SAP testing at which IOP increases, we measured IOP immediately after, 10 minutes after, and 20 minutes after SAP testing

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Conclusion