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

Abstract:

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.

journal_name

Eur J Ophthalmol

authors

Cronemberger S,Veloso AW,Veiga C,Scarpelli G,Sasso YC,Merola RV

doi

10.1177/1120672120957584

subject

Has Abstract

pub_date

2020-09-09 00:00:00

pages

1120672120957584

eissn

1120-6721

issn

1724-6016

pub_type

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