Estimating the Amount of Hemoglobin in the Neuroretinal Rim Using Color Images and OCT

Erica Medina-Mesa, Marta Gonzalez-Hernandez, Jose Sigut, Francisco Fumero-Batista, Cristina Pena-Betancor, Silvia Alayon, Manuel Gonzalez de la Rosa
2015 Current Eye Research  
Purpose: To calculate the amount of hemoglobin (Hb) in the optic nerve head (ONH), using superimposed color fundus images with disc, rim and cup boundaries obtained by OCT-Cirrus. Material and Methods: We examined 100 healthy and 121 glaucomatous eyes using Oculus-Spark perimetry, Cirrus-OCT and Visucam (Zeiss) ONH color images. The Laguna ON h E program was then used to calculate the amount of Hb in the cup and six sectors of the rim. Receiver operating characteristic (ROC) analysis was
more » ... ed and correlations between parameters were calculated. Results: In suspected and confirmed glaucoma, Hb was significantly lower than controls in all rim sectors, especially the inferior and superonasal (p50.0001). Mean deviation (MD) of visual field regions showed greater correlation with the amount of Hb in the superior and inferior sectors of the rim than with rim area (p = 0.02) or nerve fiber layer thickness (p50.0001). On ROC analysis, the best diagnostic indicators were OCT rim area, vertical cup/disc ratio (C/D) and Glaucoma Discriminant Function (GDF) of Laguna ONhE, without significant differences. Conclusions: The amount of Hb in the ONH seems to have an important relationship with glaucomatous visual field sensitivity. The remaining rim has insufficient perfusion in many cases of glaucoma.
doi:10.3109/02713683.2015.1062112 pmid:26397129 fatcat:ca2o2twcjbf57d3ftrxlkfctx4