The new Bruch’s membrane opening – minimum rim width classification improves optical coherence tomography specificity in tilted discs
Authors Rebolleda G, Casado A, Oblanca N, Muñoz-Negrete FJ
Received 20 August 2016
Accepted for publication 3 October 2016
Published 5 December 2016 Volume 2016:10 Pages 2417—2425
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 3
Editor who approved publication: Dr Scott Fraser
Gema Rebolleda, Alfonso Casado, Noelia Oblanca, Francisco J Muñoz-Negrete
Department of Ophthalmology, Hospital Universitario Ramón y Cajal, Madrid, Spain
Background and objective: To investigate and compare the false-positive (FP) diagnostic classification of the Bruch’s membrane opening – minimum rim width (BMO-MRW) and retinal nerve fiber layer (RNFL) thickness in healthy eyes with tilted optic disc.
Materials and methods: Fifty healthy eyes of 30 participants with tilted optic disc underwent BMO-MRW and RNFL scanning using Spectralis and macular Cirrus optical coherence tomography (OCT) scans.
Results: The overall FP rate was significantly lower using BMO-MRW map compared with both RNFL map by Spectralis (8% vs 62%, respectively, P<0.001) and ganglion cell analysis (GCA) map by Cirrus (8% vs 50%, respectively, P<0.001). Specificity was significantly higher using BMO-MRW than RNFL in eyes with low (89.7% vs 41.4%, P<0.001) and moderate myopia (95.2% vs 33.3%, P<0.001).
Conclusion: OCT-derived BMO-MRW analysis provides significantly greater specificity than RNFL in tilted disc irrespectively of the refractive error, and it is more specific than GCA analysis in tilted disc with moderate myopia.
Keywords: tilted disc, optical coherence tomography, false-positive, Bruch membrane
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