Correlation between retinal nerve fiber layer thickness and IOP variation in glaucoma suspects and patients with primary open-angle glaucoma

Purpose: To analyze the relationship between retinal nerve fiber layer thickness (RNFLT) and intraocular pressure (IOP) variation in glaucoma suspects (GS) and patients with primary open-angle glaucoma (POAG). Methods: Thirty-one GS and 34 POAG patients underwent ophthalmologic examination and 24-h...

Full description

Saved in:

Bibliographic Details
Published in:	European journal of ophthalmology Vol. 31; no. 5; pp. 2424 - 2431
Main Authors:	Cronemberger, Sebastião, Veloso, Artur W, Veiga, Christy, Scarpelli, Gustavo, Sasso, Yara C, Merola, Rafael V
Format:	Journal Article
Language:	English
Published:	London, England SAGE Publications 01-09-2021
Subjects:	Glaucoma Glaucoma, Open-Angle - diagnosis Humans Intraocular Pressure Nerve Fibers Optic Disk Tomography, Optical Coherence POAG IOP peak glaucoma suspect Spectral domain OCT
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Purpose: To analyze the relationship between retinal nerve fiber layer thickness (RNFLT) and intraocular pressure (IOP) variation in glaucoma suspects (GS) and patients with primary open-angle glaucoma (POAG). Methods: Thirty-one GS and 34 POAG patients underwent ophthalmologic examination and 24-h IOP measurements. GS had IOPs ranging from 19 to 24 mmHg and/or suspicious appearance of the optic nerve. POAG patients had reproducible abnormal visual fields. We only included patients who presented with short-term IOP fluctuation >6 mm Hg (∆IOP). Only one eye per patient was included through a randomized process. Peripapillary RNFLT was assessed by spectral-domain optical coherence tomography. We correlated RNFLT with IOP parameters. Results: Mean IOP was similar between GS and POAG groups (15.6 ± 3.47 vs 15.6 ± 2.83 mmHg, p = 0.90) as was IOP peak at 6 AM (21.7 ± 3.85 vs 21.3 ± 3.80 mmHg, p = 0.68). Statistically significant negative correlations were found in POAG group between IOP at 6 AM and RNFLT in global (rs = −0.543; p < 0.001), inferior (rs = −0.540; p < 0.001), superior (rs = −0.405; p = 0.009), and nasal quadrants (rs = −0.561; p < 0.001). Negative correlations were also found between ∆IOP and RNFLT in global (rs = −0.591; p < 0.001), and all other sectors (p < 0.05). In GS IOP at 6 AM correlated only with inferior quadrant (rs = −0.307; p = 0.047). Conclusion: IOP at 6 AM and ∆IOP had negative correlations with RNFLT quadrants in POAG. In GS this correlation occurred between IOP at 6 AM and inferior quadrant. These findings may indicate potential risk factors for glaucoma progression.
ISSN:	1120-6721 1724-6016
DOI:	10.1177/1120672120957584