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Abstract #86378 Published in IGR 21-2

Long-term PERG monitoring of untreated and treated glaucoma suspects

Gordon PS; Kostic M; Monsalve PF; Triolo G; Golubev L; Luna G; Ventura LM; Feuer WJ; Porciatti V
Documenta Ophthalmologica 2020; 141: 149-156

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PURPOSE: To investigate long-term structural and functional progression of untreated and treated glaucoma suspects (UGS and TGS). METHODS: Retrospective analysis of serial steady-state pattern electroretinogram (PERG), mean retinal nerve fiber layer thickness (RNFLT), and standard automated perimetry mean deviation (SAP-MD) in UGS (N = 20) and TGS (N = 18). Outcome measures were the rates of change (linear regression slopes) of PERG amplitude, PERG phase, mean RNFLT, and SAP-MD over 9.8 ± 1.3 years (15.6 ± 4.2 visits). RESULTS: The number of patients with significant (P < 0.05) progression slopes for PERG amplitude, PERG phase, RNFLT, and SAP-MD was, respectively, UGS: 5, 0, 4, 2; TGS: 8, 2, 6, 5. In UGS, outcome measures were not correlated with each other. In TGS, both PERG amplitude and RNFLT were significantly (P < 0.05) correlated with SAP-MD (R ≥ 0.58), while PERG amplitude and RNFLT were not correlated with each other (R = 0.43, P = 0.064). The rate of change of SAP-MD was predicted (P < 0.05) by a linear combination of RNFLT slope and PERG amplitude slope. CONCLUSIONS: Results substantiate and extend previous results showing that steady-state PERG amplitude progressively decreased over time in a proportion of glaucoma suspects, with relatively steeper slope in TGS compared to UGS. RNFLT progression also had a steeper slope in TGS compared to UGS; however, progressions of PERG amplitude and RNFLT were not significantly correlated. Both PERG progression and RNFLT progression independently contribute to prediction of visual field progression.

Mc Knight Vision Research Center, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, 1638 NW 10th Ave., Room 101, Miami, FL, 33136, USA.

Full article

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Classification:

6.7 Electro-ophthalmodiagnosis (Part of: 6 Clinical examination methods)

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