Ji-Woong Lee1,2, Esteban Morales1, Farideh Sharifipour1,3, Navid Amini1, Fei Yu1,4, Abdelmonem A Afifi4, Anne L Coleman1, Joseph Caprioli1, Kouros Nouri-Mahdavi1. 1. Glaucoma Division, Stein Eye Institute, David Geffen School of Medicine, University of California, Los Angeles, California, USA. 2. Department of Ophthalmology, Pusan National University College of Medicine, Busan, South Korea. 3. Department of Ophthalmology, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. 4. Department of Biostatistics, Jonathan and Karin Fielding School of Public Health at UCLA, Los Angeles, California, USA.
Abstract
AIMS: To explore the correlation of local macular ganglion cell/inner plexiform layer (GC/IPL) thickness measurements with sensitivity at individual test locations on the central 10-2 visual fields (VFs) in patients with glaucoma. METHODS: One hundred thirty-seven eyes of 125 patients with spectral domain optical coherence tomography (OCT) and 10-2 VFs were included. The exported thickness matrices (200×200) of GC/IPL measurements were centred on the fovea. Total deviation values at each test location were correlated with the 20 000 GC/IPL thickness measurements in the corresponding inferior or superior hemiretina, and areas of highest correlation were plotted. Macular structure-function relationships were also examined between six wedge-shaped GC/IPL sectors and the corresponding VF clusters. A multivariate model was built to identify the 10-2 VF test locations associated with each GC/IPL sector thickness. RESULTS: Average mean deviation on 10-2 VFs was -9.2±6.1 dB. The 10-2 VF test points demonstrated correlations with GC/IPL thickness in localised arcuate patterns mostly limited within the central 4.8×4.0 mm measurement ellipse (ρ=0.43-0.74, p<0.05 for all). Twenty-one test points of the 10-2 VF were the best predictors of sectoral GC/IPL thickness. Sectoral VF-OCT correlations were high (ρ=0.53-0.66, p<0.001) and did not significantly change after adjusting for retinal GC displacement (p>0.05). CONCLUSIONS: Macular OCT/VF relationships have localised arcuate characteristics in the central region of the macula. Given the overlapping nature of structure-function relationships, a smaller number of VF test locations may be used to summarise macular functional damage. TRIAL REGISTRATION NUMBER: NCT01742819. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.
AIMS: To explore the correlation of local macular ganglion cell/inner plexiform layer (GC/IPL) thickness measurements with sensitivity at individual test locations on the central 10-2 visual fields (VFs) in patients with glaucoma. METHODS: One hundred thirty-seven eyes of 125 patients with spectral domain optical coherence tomography (OCT) and 10-2 VFs were included. The exported thickness matrices (200×200) of GC/IPL measurements were centred on the fovea. Total deviation values at each test location were correlated with the 20 000 GC/IPL thickness measurements in the corresponding inferior or superior hemiretina, and areas of highest correlation were plotted. Macular structure-function relationships were also examined between six wedge-shaped GC/IPL sectors and the corresponding VF clusters. A multivariate model was built to identify the 10-2 VF test locations associated with each GC/IPL sector thickness. RESULTS: Average mean deviation on 10-2 VFs was -9.2±6.1 dB. The 10-2 VF test points demonstrated correlations with GC/IPL thickness in localised arcuate patterns mostly limited within the central 4.8×4.0 mm measurement ellipse (ρ=0.43-0.74, p<0.05 for all). Twenty-one test points of the 10-2 VF were the best predictors of sectoral GC/IPL thickness. Sectoral VF-OCT correlations were high (ρ=0.53-0.66, p<0.001) and did not significantly change after adjusting for retinal GC displacement (p>0.05). CONCLUSIONS: Macular OCT/VF relationships have localised arcuate characteristics in the central region of the macula. Given the overlapping nature of structure-function relationships, a smaller number of VF test locations may be used to summarise macular functional damage. TRIAL REGISTRATION NUMBER: NCT01742819. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.
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