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Oertel FC, Hastermann M, Paul F. Delimiting MOGAD as a disease entity using translational imaging. Front Neurol 2023; 14:1216477. [PMID: 38333186 PMCID: PMC10851159 DOI: 10.3389/fneur.2023.1216477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 08/23/2023] [Indexed: 02/10/2024] Open
Abstract
The first formal consensus diagnostic criteria for myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD) were recently proposed. Yet, the distinction of MOGAD-defining characteristics from characteristics of its important differential diagnoses such as multiple sclerosis (MS) and aquaporin-4 antibody seropositive neuromyelitis optica spectrum disorder (NMOSD) is still obstructed. In preclinical research, MOG antibody-based animal models were used for decades to derive knowledge about MS. In clinical research, people with MOGAD have been combined into cohorts with other diagnoses. Thus, it remains unclear to which extent the generated knowledge is specifically applicable to MOGAD. Translational research can contribute to identifying MOGAD characteristic features by establishing imaging methods and outcome parameters on proven pathophysiological grounds. This article reviews suitable animal models for translational MOGAD research and the current state and prospect of translational imaging in MOGAD.
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Affiliation(s)
- Frederike Cosima Oertel
- Experimental and Clinical Research Center, Max-Delbrück-Centrum für Molekulare Medizin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Neuroscience Clinical Research Center, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Department of Neurology, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Maria Hastermann
- Experimental and Clinical Research Center, Max-Delbrück-Centrum für Molekulare Medizin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Neuroscience Clinical Research Center, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Friedemann Paul
- Experimental and Clinical Research Center, Max-Delbrück-Centrum für Molekulare Medizin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Neuroscience Clinical Research Center, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Department of Neurology, Freie Universität Berlin and Humboldt-Universität zu Berlin, Charité – Universitätsmedizin Berlin, Berlin, Germany
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Rosenkranz SC, Gutmann L, Has Silemek AC, Dorr M, Häußler V, Lüpke M, Mönch A, Reinhardt S, Kuhle J, Tilsley P, Heesen C, Friese MA, Brandt A, Paul F, Zimmermann H, Stellmann JP. Visual function resists early neurodegeneration in the visual system in primary progressive multiple sclerosis. J Neurol Neurosurg Psychiatry 2023; 94:924-933. [PMID: 37433662 DOI: 10.1136/jnnp-2023-331183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/31/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND Neurodegeneration in multiple sclerosis (MS) affects the visual system but dynamics and pathomechanisms over several years especially in primary progressive MS (PPMS) are not fully understood. METHODS We assessed longitudinal changes in visual function, retinal neurodegeneration using optical coherence tomography, MRI and serum NfL (sNfL) levels in a prospective PPMS cohort and matched healthy controls. We investigated the changes over time, correlations between outcomes and with loss of visual function. RESULTS We followed 81 patients with PPMS (mean disease duration 5.9 years) over 2.7 years on average. Retinal nerve fibre layer thickness (RNFL) was reduced in comparison with controls (90.1 vs 97.8 µm; p<0.001). Visual function quantified by the area under the log contrast sensitivity function (AULCSF) remained stable over a continuous loss of RNFL (0.46 µm/year, 95% CI 0.10 to 0.82; p=0.015) up until a mean turning point of 91 µm from which the AULCSF deteriorated. Intereye RNFL asymmetry above 6 µm, suggestive of subclinical optic neuritis, occurred in 15 patients and was related to lower AULCSF but occurred also in 5 out of 44 controls. Patients with an AULCSF progression had a faster increase in Expanded Disability Status Scale (beta=0.17/year, p=0.043). sNfL levels were elevated in patients (12.2 pg/mL vs 8.0 pg/mL, p<0.001), but remained stable during follow-up (beta=-0.14 pg/mL/year, p=0.291) and were not associated with other outcomes. CONCLUSION Whereas neurodegeneration in the anterior visual system is already present at onset, visual function is not impaired until a certain turning point. sNfL is not correlated with structural or functional impairment in the visual system.
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Affiliation(s)
- Sina C Rosenkranz
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Lilija Gutmann
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Arzu Ceylan Has Silemek
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | | | - Vivien Häußler
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Margareta Lüpke
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Andrea Mönch
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Stefanie Reinhardt
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Jens Kuhle
- Multiple Sclerosis Centre and Research Center for Clinical Neuroimmunology and Neuroscience (RC2NB), Departments of Biomedicine and Clinical Research, University Hospital and University of Basel, Basel, Switzerland
- Department of Neurology, University Hospital and University of Basel, Basel, Switzerland
| | - Penelope Tilsley
- CEMEREM, APHM, Hôpital de la Timone, Marseille, France
- CRMBM, Aix Marseille Univ, CNRS, Marseille, France
| | - Christoph Heesen
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Manuel A Friese
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Alexander Brandt
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine and Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Department of Neurology, University of California Irvine, Irvine, California, USA
| | - Friedemann Paul
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine and Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Hanna Zimmermann
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine and Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Jan-Patrick Stellmann
- Institut für Neuroimmunologie und Multiple Sklerose (INIMS), Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Germany
- CEMEREM, APHM, Hôpital de la Timone, Marseille, France
- CRMBM, Aix Marseille Univ, CNRS, Marseille, France
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Wolf HN, Ehinger V, Guempelein L, Banerjee P, Kuempfel T, Havla J, Pauly D. NMOSD IgG Impact Retinal Cells in Murine Retinal Explants. Curr Issues Mol Biol 2023; 45:7319-7335. [PMID: 37754247 PMCID: PMC10529972 DOI: 10.3390/cimb45090463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/29/2023] [Accepted: 09/05/2023] [Indexed: 09/28/2023] Open
Abstract
Neuromyelitis optica spectrum disorders (NMOSD) are chronic inflammatory diseases of the central nervous system, characterized by autoantibodies against aquaporin-4. The symptoms primarily involve severe optic neuritis and longitudinally extensive transverse myelitis. Although the disease progression is typically relapse-dependent, recent studies revealed retinal neuroaxonal degeneration unrelated to relapse activity, potentially due to anti-aquaporin-4-positive antibodies interacting with retinal glial cells such as Müller cells. In this exploratory study, we analysed the response of mouse retinal explants to NMOSD immunoglobulins (IgG). Mouse retinal explants were treated with purified IgG from patient or control sera for one and three days. We characterized tissue response patterns through morphological changes, chemokine secretion, and complement expression. Mouse retinal explants exhibited a basic proinflammatory response ex vivo, modified by IgG addition. NMOSD IgG, unlike control IgG, increased gliosis and decreased chemokine release (CCL2, CCL3, CCL4, and CXCL-10). Complement component expression by retinal cells remained unaltered by either IgG fraction. We conclude that human NMOSD IgG can possibly bind in the mouse retina, altering the local cellular environment. This intraretinal stress may contribute to retinal degeneration independent of relapse activity in NMOSD, suggesting a primary retinopathy.
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Affiliation(s)
- Hannah Nora Wolf
- Department of Experimental Ophthalmology, University Marburg, 35037 Marburg, Germany
| | - Veronika Ehinger
- Department of Experimental Ophthalmology, University Marburg, 35037 Marburg, Germany
| | - Larissa Guempelein
- Department of Experimental Ophthalmology, University Marburg, 35037 Marburg, Germany
| | - Pratiti Banerjee
- Department of Experimental Ophthalmology, University Marburg, 35037 Marburg, Germany
| | - Tania Kuempfel
- Institute of Clinical Neuroimmunology, Biomedical Center and University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Joachim Havla
- Institute of Clinical Neuroimmunology, Biomedical Center and University Hospital, Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | - Diana Pauly
- Department of Experimental Ophthalmology, University Marburg, 35037 Marburg, Germany
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Remlinger J, Bagnoud M, Meli I, Massy M, Hoepner R, Linington C, Chan A, Bennett JL, Enzmann V, Salmen A. Modeling MOG Antibody-Associated Disorder and Neuromyelitis Optica Spectrum Disorder in Animal Models: Visual System Manifestations. NEUROLOGY(R) NEUROIMMUNOLOGY & NEUROINFLAMMATION 2023; 10:e200141. [PMID: 37429715 PMCID: PMC10691219 DOI: 10.1212/nxi.0000000000200141] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 05/15/2023] [Indexed: 07/12/2023]
Abstract
BACKGROUND AND OBJECTIVES Mechanisms of visual impairment in aquaporin 4 antibody (AQP4-IgG) seropositive neuromyelitis optica spectrum disorder (NMOSD) and myelin oligodendrocyte glycoprotein antibody (MOG-IgG)-associated disorder (MOGAD) are incompletely understood. The respective impact of optic nerve demyelination and primary and secondary retinal neurodegeneration are yet to be investigated in animal models. METHODS Active MOG35-55 experimental autoimmune encephalomyelitis (EAE) was induced in C57BL/6Jrj mice, and monoclonal MOG-IgG (8-18C5, murine), recombinant AQP4-IgG (rAb-53, human), or isotype-matched control IgG (Iso-IgG, human) was administered 10 days postimmunization. Mobility impairment was scored daily. Visual acuity by optomotor reflex and ganglion cell complex thickness (GCC, 3 innermost retinal layers) by optical coherence tomography (OCT) were longitudinally assessed. Histopathology of optic nerve and retina was investigated during presymptomatic, acute, and chronic disease phases for immune cells, demyelination, complement deposition, natural killer (NK) cell, AQP4, and astrocyte involvement, retinal ganglion cells (RGCs), and Müller cell activation. Groups were compared by nonparametric tests with a p value <0.05 indicating statistical significance. RESULTS Visual acuity decreased from baseline to chronic phase in MOG-IgG (mean ± standard error of the mean: 0.54 ± 0.01 to 0.46 ± 0.02 cycles/degree, p < 0.05) and AQP4-IgG EAE (0.54 ± 0.01 to 0.43 ± 0.02, cycles/degree, p < 0.05). Immune cell infiltration of optic nerves started in presymptomatic AQP4-IgG, but not in MOG-IgG EAE (5.85 ± 2.26 vs 0.13 ± 0.10 macrophages/region of interest [ROI] and 1.88 ± 0.63 vs 0.15 ± 0.06 T cells/ROI, both p < 0.05). Few NK cells, no complement deposition, and stable glial fibrillary acid protein and AQP4 fluorescence intensity characterized all EAE optic nerves. Lower GCC thickness (Spearman correlation coefficient r = -0.44, p < 0.05) and RGC counts (r = -0.47, p < 0.05) correlated with higher mobility impairment. RGCs decreased from presymptomatic to chronic disease phase in MOG-IgG (1,705 ± 51 vs 1,412 ± 45, p < 0.05) and AQP4-IgG EAE (1,758 ± 14 vs 1,526 ± 48, p < 0.01). Müller cell activation was not observed in either model. DISCUSSION In a multimodal longitudinal characterization of visual outcome in animal models of MOGAD and NMOSD, differential retinal injury and optic nerve involvement were not conclusively clarified. Yet optic nerve inflammation was earlier in AQP4-IgG-associated pathophysiology. Retinal atrophy determined by GCC thickness (OCT) and RGC counts correlating with mobility impairment in the chronic phase of MOG-IgG and AQP4-IgG EAE may serve as a generalizable marker of neurodegeneration.
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Affiliation(s)
- Jana Remlinger
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Maud Bagnoud
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Ivo Meli
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Marine Massy
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Robert Hoepner
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Christopher Linington
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Andrew Chan
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Jeffrey L Bennett
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Volker Enzmann
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland
| | - Anke Salmen
- From the Department of Neurology (J.R., M.B., I.M., M.M., R.H., A.C., A.S.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland; Graduate School for Cellular and Biomedical Sciences (J.R., M.M.), University of Bern, Switzerland; Institute of Infection (C.L.), Immunity and Inflammation, University of Glasgow, UK; Departments of Neurology and Ophthalmology (J.L.B.), Programs in Neuroscience and Immunology, University of Colorado Anschutz Medical Campus, Aurora; and Department of Ophthalmology (V.E.), Inselspital, Bern University Hospital and Department for BioMedical Research (DBMR), University of Bern, Switzerland.
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Mompart-Martínez R, Argilés M, Cardona G, Cavero-Roig L, González-Sanchís L, Pighin MS. The Relationship between Fixation Stability and Retinal Structural Parameters in Children with Anisometropic, Strabismic and Mixed Amblyopia. Life (Basel) 2023; 13:1517. [PMID: 37511892 PMCID: PMC10381323 DOI: 10.3390/life13071517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 06/28/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
(1) Background: Amblyopia is an ocular condition leading to structural and functional changes. The relationship between these changes is complex and remains poorly understood. (2) Methods: Participants included 31 children aged 5 to 9 years with strabismic (n = 9), anisometropic (n = 16) and mixed (n = 6) unilateral amblyopia, and 14 age-matched non-amblyopic children. The 95% and 63% Bivariate Contour Ellipse Area (BCEA), axial length, Foveal Avascular Zone (FAZ) area, center macular thickness and volume were assessed. The relationship between these parameters was explored. (3) Results: Statistically significant differences were found among the four groups in best corrected distance visual acuity (BCVA) (p < 0.001), BCEA 95% (p = 0.002) and BCEA 63% (p = 0.002), but not in the FAZ area, central macular thickness, central macular volume and axial length. Eyes with amblyopia had poorer BCVA and larger fixation instability than controls. Inter-ocular differences were more significant in patients with strabismic amblyopia, particularly in BCVA (p = 0.003), central macular thickness (p < 0.001) and central macular volume (p = 0.002). In amblyopic eyes, BCEA 95% and 63% were correlated with BCVA, but not with the FAZ area. (4) Conclusion: Amblyopia is associated with a reduction in fixation stability and BCVA, although there is a general lack of correlation with structural changes, suggesting a complex interaction between anatomy and function in amblyopia.
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Affiliation(s)
- Raquel Mompart-Martínez
- Institut Català de la Retina (ICR), 08022 Barcelona, Spain
- Department of Optics and Optometry, Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
| | - Marc Argilés
- Department of Optics and Optometry, Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
- Center for Sensors, Instruments, and Systems Development (CD6), Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
| | - Genis Cardona
- Department of Optics and Optometry, Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
- Applied Optics and Image Processing Group (GOAPI), Universitat Politècnica de Catalunya (UPC), 08222 Terrassa, Spain
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