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Graefe's Archive for Clinical and Experimental Ophthalmology

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01-07-2018 | Glaucoma

Event-based analysis of visual field change can miss fast glaucoma progression detected by a combined structure and function index

Authors: Chunwei Zhang, Andrew J. Tatham, Fábio B. Daga, Alessandro A. Jammal, Felipe A. Medeiros

Published in: Graefe's Archive for Clinical and Experimental Ophthalmology | Issue 7/2018

Abstract

Purpose

To investigate the relationship between progression assessed by the visual field guided progression analysis (GPA) and rates of structural and functional change in glaucoma eyes.

Methods

This was a longitudinal observational study of 135 eyes of 97 patients with glaucoma followed for an average of 3.5 ± 0.9 years. All patients had standard automated perimetry (SAP) and retinal nerve fiber layer (RNFL) analysis with spectral domain optical coherence tomography (SDOCT), with an average of 6.8 ± 2.3 visits. A control group of healthy eyes followed longitudinally was used to estimate age-related change. Visual field progression was assessed using the Humphrey Field Analyzer GPA. Estimates of retinal ganglion cell counts from SAP and SDOCT were used to obtain a combined index of glaucomatous damage (RGC index) according to a previously described algorithm. Progression by SDOCT and the retinal ganglion cell (RGC) index were defined as statistically significant (P < 0.05) slopes of change that were also faster than age-related change estimated from healthy eyes.

Results

From the 135 eyes, 15 (11%) progressed by GPA, 21 (16%) progressed by SDOCT, and 31 (23%) progressed by the RGC index. Twenty-one eyes showed progression by the RGC index that was missed by the GPA. These eyes had an average rate of change in estimated RGC counts of − 28,910 cells/year, ranging from two to nine times faster than expected age-related losses.

Conclusion

Many glaucomatous eyes that are not found to be progressing by GPA may actually have fast rates of change as detected by a combined index of structure and function.

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Title: Event-based analysis of visual field change can miss fast glaucoma progression detected by a combined structure and function index
Authors: Chunwei Zhang
Andrew J. Tatham
Fábio B. Daga
Alessandro A. Jammal
Felipe A. Medeiros
Publication date: 01-07-2018
Publisher: Springer Berlin Heidelberg
Published in: Graefe's Archive for Clinical and Experimental Ophthalmology / Issue 7/2018
Print ISSN: 0721-832X
Electronic ISSN: 1435-702X
DOI: https://doi.org/10.1007/s00417-018-3963-3

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Event-based analysis of visual field change can miss fast glaucoma progression detected by a combined structure and function index

Abstract

Purpose

Methods

Results

Conclusion

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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