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Kalloniatis M, Wang H, Phu J, Tong J, Armitage J. Optical coherence tomography angiography in the diagnosis of ocular disease. Clin Exp Optom 2024; 107:482-498. [PMID: 38452795 DOI: 10.1080/08164622.2024.2323603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 02/21/2024] [Indexed: 03/09/2024] Open
Abstract
Clinical imaging provided by optical coherence tomography (OCT) and its variant, OCT-angiography (OCT-A), has revolutionised eyecare practice. The imaging techniques allow for the identification and quantification of ocular structures, supporting the diagnosis and prognosis of eye disease. In this review, an overview of the usefulness of OCT-A imaging in the diagnosis and management of a range of ocular conditions is provided when used in isolation or in combination with other imaging modalities and measures of visual function (visual field results). OCT-A imaging has the capacity to identify and quantify ocular vasculature non-invasively, thereby assisting the clinician in the diagnosis or to determine the efficacy of intervention in ocular conditions impacting retinal vasculature. Thus, additional clinically useful information can be obtained in eye diseases involving conditions such as those impacting retinal vessel occlusion, in diabetic retinopathy, inherited retinal dystrophy, age-related macular degeneration, choroidal neovascularisation and optic nerve disorders. Through a clinical case series, various ocular conditions are reviewed, and the impact of OCT-A imaging is discussed. Although OCT-A imaging has great promise and is already used in clinical management, there is a lack of set standards to characterise altered vascular features in disease and consequently for prognostication, primarily due to a lack of large-scale clinical trials and variability in OCT-A algorithms when generating quantitative parameters.
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Affiliation(s)
- Michael Kalloniatis
- School of Medicine (Optometry), Deakin University, Waurn Ponds, VIC, Australia
- School of Optometry and Vision Science, University of New South Wales, Kensington, NSW, Australia
| | - Henrietta Wang
- School of Optometry and Vision Science, University of New South Wales, Kensington, NSW, Australia
- Centre for Eye Health, University of New South Wales, Kensington, NSW, Australia
| | - Jack Phu
- School of Medicine (Optometry), Deakin University, Waurn Ponds, VIC, Australia
- School of Optometry and Vision Science, University of New South Wales, Kensington, NSW, Australia
| | - Janelle Tong
- School of Optometry and Vision Science, University of New South Wales, Kensington, NSW, Australia
- Centre for Eye Health, University of New South Wales, Kensington, NSW, Australia
| | - James Armitage
- School of Medicine (Optometry), Deakin University, Waurn Ponds, VIC, Australia
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2
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D’Angelo A, Vitiello L, Gagliardi V, Salerno G, De Pascale I, Coppola A, Abbinante G, Pellegrino A, Giannaccare G. The Role of Oral Supplementation for the Management of Age-Related Macular Degeneration: A Narrative Review. J Pers Med 2024; 14:653. [PMID: 38929874 PMCID: PMC11204429 DOI: 10.3390/jpm14060653] [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: 05/18/2024] [Revised: 06/12/2024] [Accepted: 06/17/2024] [Indexed: 06/28/2024] Open
Abstract
The majority of neurodegenerative eye disorders occur with aging and significantly impair quality of life. Age-related macular degeneration (AMD) is the third most common cause of visual impairment and blindness worldwide. One of the most important elements in the pathophysiology of neurodegenerative eye disease is certainly oxidative stress, with neuroinflammation and ocular ischemia which may also be significant factors. Antioxidants, either by food or oral supplementation, may be able to mitigate the deleterious effects of reactive oxygen species that build as a result of oxidative stress, ischemia, and inflammation. Over the past few decades, a number of research works examining the potential adjuvant impact of antioxidants in AMD have been published. In fact, there is not only more and more interest in already known molecules but also in new molecules that can help clinicians in the management of this complex multifactorial disease, such as astaxanthin and melatonin. However, while some studies showed encouraging outcomes, others were conflicting. In addition, more and more attention is also being paid to nutrition, considered a pivotal key point, especially to prevent AMD. For this reason, the purpose of this review is to analyze the main antioxidant molecules currently used as oral supplements for AMD treatment, as well as the role of diet and food intake in this ocular disease, to better understand how all these factors can improve the clinical management of AMD patients.
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Affiliation(s)
- Angela D’Angelo
- Department of Clinical Sciences and Community Health, University of Milan, 20133 Milan, MI, Italy;
| | - Livio Vitiello
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, 84035 Polla, SA, Italy; (L.V.); (V.G.); (G.S.); (I.D.P.); (A.C.); (G.A.); (A.P.)
| | - Vincenzo Gagliardi
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, 84035 Polla, SA, Italy; (L.V.); (V.G.); (G.S.); (I.D.P.); (A.C.); (G.A.); (A.P.)
| | - Giulio Salerno
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, 84035 Polla, SA, Italy; (L.V.); (V.G.); (G.S.); (I.D.P.); (A.C.); (G.A.); (A.P.)
| | - Ilaria De Pascale
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, 84035 Polla, SA, Italy; (L.V.); (V.G.); (G.S.); (I.D.P.); (A.C.); (G.A.); (A.P.)
| | - Alessia Coppola
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, 84035 Polla, SA, Italy; (L.V.); (V.G.); (G.S.); (I.D.P.); (A.C.); (G.A.); (A.P.)
| | - Giulia Abbinante
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, 84035 Polla, SA, Italy; (L.V.); (V.G.); (G.S.); (I.D.P.); (A.C.); (G.A.); (A.P.)
| | - Alfonso Pellegrino
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, 84035 Polla, SA, Italy; (L.V.); (V.G.); (G.S.); (I.D.P.); (A.C.); (G.A.); (A.P.)
| | - Giuseppe Giannaccare
- Eye Clinic, Department of Surgical Sciences, University of Cagliari, 09124 Cagliari, CA, Italy
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3
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Burchard CVD, Roider J, Kepp T. Analysis of OCT Scanning Parameters in AMD and RVO. Diagnostics (Basel) 2024; 14:516. [PMID: 38472988 DOI: 10.3390/diagnostics14050516] [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: 02/02/2024] [Revised: 02/19/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
Optical coherence tomography (OCT) is an extensively used imaging tool for disease monitoring in both age-related macular degeneration (AMD) and retinal vein occlusion (RVO). However, there is limited literature on minimum requirements of OCT settings for reliable biomarker detection. This study systematically investigates both the influence of scan size and interscan distance (ISD) on disease activity detection. We analyzed 80 OCT volumes of AMD patients and 12 OCT volumes of RVO patients for the presence of subretinal fluid (SRF), intraretinal fluid (IRF), and pigment epithelium detachment (PED). All volume scans had a scan size of 6 × 6 mm and an ISD of 125 µm. We analyzed both general fluid distribution and how biomarker detection sensitivity decreases when reducing scan size or density. We found that in AMD patients, all fluids were nearly normally distributed, with most occurrences in the foveal center and concentric decrease towards the periphery. When reducing the scan size to 3 × 3 and 2 × 2 mm, disease activity detection was still high (0.98 and 0.96). Increasing ISD only slightly can already compromise biomarker detection sensitivity (0.9 for 250 µm ISD against 125 µm ISD).
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Affiliation(s)
| | - Johann Roider
- Department of Ophthalmology, Kiel University, 24105 Kiel, Germany
| | - Timo Kepp
- German Research Center for Artificial Intelligence, 23562 Lübeck, Germany
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Tombolini B, Crincoli E, Sacconi R, Battista M, Fantaguzzi F, Servillo A, Bandello F, Querques G. Optical Coherence Tomography Angiography: A 2023 Focused Update on Age-Related Macular Degeneration. Ophthalmol Ther 2024; 13:449-467. [PMID: 38180632 PMCID: PMC10787708 DOI: 10.1007/s40123-023-00870-2] [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: 09/14/2023] [Accepted: 12/05/2023] [Indexed: 01/06/2024] Open
Abstract
Optical coherence tomography angiography (OCTA) has extensively enhanced our comprehension of eye microcirculation and of its associated diseases. In this narrative review, we explored the key concepts behind OCTA, as well as the most recent evidence in the pathophysiology of age-related macular degeneration (AMD) made possible by OCTA. These recommendations were updated since the publication in 2020, and are targeted for 2023. Importantly, as a future perspective in OCTA technology, we will discuss how artificial intelligence has been applied to OCTA, with a particular emphasis on its application to AMD study.
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Affiliation(s)
- Beatrice Tombolini
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Emanuele Crincoli
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Riccardo Sacconi
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Marco Battista
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Federico Fantaguzzi
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Andrea Servillo
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Francesco Bandello
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Giuseppe Querques
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy.
- Division of Head and Neck, Ophthalmology Unit, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy.
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Li Z, Huang G, Zou B, Chen W, Zhang T, Xu Z, Cai K, Wang T, Sun Y, Wang Y, Jin K, Huang X. Segmentation of Low-Light Optical Coherence Tomography Angiography Images under the Constraints of Vascular Network Topology. SENSORS (BASEL, SWITZERLAND) 2024; 24:774. [PMID: 38339491 PMCID: PMC10856982 DOI: 10.3390/s24030774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/27/2023] [Accepted: 01/03/2024] [Indexed: 02/12/2024]
Abstract
Optical coherence tomography angiography (OCTA) offers critical insights into the retinal vascular system, yet its full potential is hindered by challenges in precise image segmentation. Current methodologies struggle with imaging artifacts and clarity issues, particularly under low-light conditions and when using various high-speed CMOS sensors. These challenges are particularly pronounced when diagnosing and classifying diseases such as branch vein occlusion (BVO). To address these issues, we have developed a novel network based on topological structure generation, which transitions from superficial to deep retinal layers to enhance OCTA segmentation accuracy. Our approach not only demonstrates improved performance through qualitative visual comparisons and quantitative metric analyses but also effectively mitigates artifacts caused by low-light OCTA, resulting in reduced noise and enhanced clarity of the images. Furthermore, our system introduces a structured methodology for classifying BVO diseases, bridging a critical gap in this field. The primary aim of these advancements is to elevate the quality of OCTA images and bolster the reliability of their segmentation. Initial evaluations suggest that our method holds promise for establishing robust, fine-grained standards in OCTA vascular segmentation and analysis.
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Affiliation(s)
- Zhi Li
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
| | - Gaopeng Huang
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
| | - Binfeng Zou
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
| | - Wenhao Chen
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
| | - Tianyun Zhang
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
| | - Zhaoyang Xu
- Department of Paediatrics, University of Cambridge, Cambridge CB2 1TN, UK;
| | - Kunyan Cai
- Faculty of Applied Sciences, Macao Polytechnic University, Macao SAR 999078, China;
| | - Tingyu Wang
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
| | - Yaoqi Sun
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
- Lishui Institute, Hangzhou Dianzi University, Lishui 323000, China
| | - Yaqi Wang
- College of Media Engineering, Communication University of Zhejiang, Hangzhou 310018, China;
| | - Kai Jin
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310027, China;
| | - Xingru Huang
- School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China; (Z.L.); (G.H.); (B.Z.); (W.C.); (T.Z.); (T.W.); (Y.S.)
- School of Electronic Engineering and Computer Science, Queen Mary University of London, London E3 4BL, UK
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Wiest MRJ, Toro MD, Nowak A, Bajka A, Fasler K, Al-Sheikh M, Hamann T, Zweifel SA. Relationship of Vessel Density to Vessel Length Density in Patients with Treated Fabry Disease. Diagnostics (Basel) 2023; 13:diagnostics13071227. [PMID: 37046445 PMCID: PMC10093750 DOI: 10.3390/diagnostics13071227] [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: 12/28/2022] [Revised: 02/27/2023] [Accepted: 03/16/2023] [Indexed: 04/14/2023] Open
Abstract
BACKGROUND Fabry disease (FD) is a potentially lethal lysosomal disorder with systemic vascular changes. Previous studies demonstrated retinal vascular involvement using optical coherence tomography angiography (OCTA) in affected patients; Aim: To analyze and quantify the retinal vasculature measuring vessel density (VD), vessel length density (VLD), and the ratio of VD to VLD (VD/VLD) in superficial capillary plexuses (SCP) and deep capillary plexuses (DCP) using OCTA in patients with FD and to show whether they differ from healthy controls (HC); Patients and methods: Single-center, retrospective, consecutive cohort study of patients with genetically proven FD. Patients underwent an ophthalmological examination including OCTA. VD, VLD, foveal avascular zone (FAZ), and the VD/VLD were compared to an HC group using a linear mixed model; Results: A statistically significant difference in the VLD and VD/VLD of DCP was observed between the two groups (p < 0.001). Using ROC curves with AUC and Youden's Index, a cut-off value for differentiating both groups using VD/VLD in DCP FD with high specificity and high sensitivity was established; Conclusions: FD and HC groups seem to be separable using the VD/VLD ratio in DCP. This new biomarker might differentiate changes in the retinal microvasculature that are not detectable by VD or VLD alone.
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Affiliation(s)
| | - Mario Damiano Toro
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
- Eye Clinic, Public Health Department, Federico II University, 80131 Naples, Italy
- Chair and Department of Ophthalmology with Pediatric Service, Medical University of Lublin, 20079 Lublin, Poland
| | - Albina Nowak
- Department of Endocrinology and Clinical Nutrition, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
- Department of Internal Medicine, Psychiatry University Clinic Zurich, 8091 Zurich, Switzerland
| | - Anahita Bajka
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
| | - Katrin Fasler
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
| | - Mayss Al-Sheikh
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
| | - Timothy Hamann
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
| | - Sandrine Anne Zweifel
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
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Vitiello L, De Bernardo M, Cornetta P. Editorial: Optical coherence tomography and OCT angiography examination in systemic diseases. Front Med (Lausanne) 2023; 10:1147909. [PMID: 36844212 PMCID: PMC9948008 DOI: 10.3389/fmed.2023.1147909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 01/27/2023] [Indexed: 02/11/2023] Open
Affiliation(s)
- Livio Vitiello
- Eye Unit, “Luigi Curto” Hospital, Azienda Sanitaria Locale Salerno, Salerno, Italy,*Correspondence: Livio Vitiello ✉
| | - Maddalena De Bernardo
- Eye Unit, Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
| | - Palmiro Cornetta
- Eye Unit, “Maria SS Addolorata” Hospital, Azienda Sanitaria Locale Salerno, Salerno, Italy
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Ma Z, Feng D, Wang J, Ma H. Retinal OCTA Image Segmentation Based on Global Contrastive Learning. SENSORS (BASEL, SWITZERLAND) 2022; 22:9847. [PMID: 36560216 PMCID: PMC9781437 DOI: 10.3390/s22249847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/11/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
The automatic segmentation of retinal vessels is of great significance for the analysis and diagnosis of retinal related diseases. However, the imbalanced data in retinal vascular images remain a great challenge. Current image segmentation methods based on deep learning almost always focus on local information in a single image while ignoring the global information of the entire dataset. To solve the problem of data imbalance in optical coherence tomography angiography (OCTA) datasets, this paper proposes a medical image segmentation method (contrastive OCTA segmentation net, COSNet) based on global contrastive learning. First, the feature extraction module extracts the features of OCTA image input and maps them to the segment head and the multilayer perceptron (MLP) head, respectively. Second, a contrastive learning module saves the pixel queue and pixel embedding of each category in the feature map into the memory bank, generates sample pairs through a mixed sampling strategy to construct a new contrastive loss function, and forces the network to learn local information and global information simultaneously. Finally, the segmented image is fine tuned to restore positional information of deep vessels. The experimental results show the proposed method can improve the accuracy (ACC), the area under the curve (AUC), and other evaluation indexes of image segmentation compared with the existing methods. This method could accomplish segmentation tasks in imbalanced data and extend to other segmentation tasks.
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Affiliation(s)
- Ziping Ma
- College of Mathematics and Information Science, North Minzu University, Yinchuan 750021, China
| | - Dongxiu Feng
- College of Computer Science and Engineering, North Minzu University, Yinchuan 750021, China
| | - Jingyu Wang
- College of Mathematics and Information Science, North Minzu University, Yinchuan 750021, China
| | - Hu Ma
- College of Mathematics and Information Science, North Minzu University, Yinchuan 750021, China
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Tombolini B, Borrelli E, Sacconi R, Bandello F, Querques G. Diabetic macular ischemia. Acta Diabetol 2022; 59:751-759. [PMID: 35133500 DOI: 10.1007/s00592-021-01844-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 12/20/2021] [Indexed: 12/14/2022]
Abstract
AIM Since its relevance on diagnosis and prognosis of diabetic retinopathy (DR), this review will examine a multimodal imaging approach to detect diabetic macular ischemia (DMI). METHODS A PubMed engine search was carried out using the term "macular ischemia" paired with "diabetes," and "diabetic macular ischemia" paired to "fluorescein angiography," "ultra-wide field fluorescein angiography," "optical coherence tomography angiography," "octa," "2D octa," "ultra-wide field octa," "3D octa," "visual acuity." All studies published in English up to October 2021 irrespective of their publication status were reviewed, and relevant publications were included in this review. RESULTS Recently, new technologies have been proposed as an alternative to fluorescein angiography (FA), which is an actual diagnostic gold standard technique. Nowadays, optical coherence tomography angiography (OCTA) has emerged as the most promising and reliable procedure able to provide a qualitative and quantitative description of DMI. Newer three-dimensional (3D) OCTA approach will be discussed too. Moreover, we will discuss how OCTA might identify preclinical alterations before the onset of DR and allow prediction about the progression of disease. CONCLUSION OCTA has significantly expanded our knowledge on diabetic macular ischemia.
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Affiliation(s)
- Beatrice Tombolini
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Ophthalmology Unit, Division of Head and Neck, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Enrico Borrelli
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Ophthalmology Unit, Division of Head and Neck, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Riccardo Sacconi
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Ophthalmology Unit, Division of Head and Neck, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Francesco Bandello
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Ophthalmology Unit, Division of Head and Neck, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Giuseppe Querques
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy.
- Ophthalmology Unit, Division of Head and Neck, Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy.
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10
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Imaging of iris vasculature: current limitations and future perspective. Eye (Lond) 2022; 36:930-940. [PMID: 34650219 PMCID: PMC9046297 DOI: 10.1038/s41433-021-01809-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 08/22/2021] [Accepted: 10/01/2021] [Indexed: 12/22/2022] Open
Abstract
Fluorescein and indocyanine green angiography have been the traditional ways to image the vasculature of the iris in the last few decades. Because of the invasive nature of these procedures, they are performed in rare situations, and thus, our understanding about iris vasculature is very limited. Optical coherence tomography angiography (OCTA) is a noninvasive imaging method that enables the detailed visualization of the retinal and choroidal vascular networks. More recently, it has been also used for the examination of the iris vasculature in healthy and disease eyes. However, there is a lack of uniformity in the image acquisition protocols and interpretations in both healthy and pathological conditions. Artifacts of iris OCTA include shadowing, motion, segmentations errors, mirror effects. OCTA devices have an eye-tracking system designed for the posterior segment and the applications of these systems on the anterior segment can determine motion lines, vessel duplication, and vessel discontinuity. OCTA of the iris should always be performed under ambient room lighting to create miosis and reduce iris vasculature changes during the examination. In the near future, eye-tracking systems specifically designed for the iris vessels could permit the follow-up function, and the development of new OCTA metrics could reveal interesting applications of this new imaging technique.
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Wiest MRJ, Hamann T, Zweifel S. Effect of Valsalva Maneuver on Choriocapillary Retinal Microvasculature. Klin Monbl Augenheilkd 2022; 239:523-526. [PMID: 35472797 DOI: 10.1055/a-1766-6071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE We aimed to identify and evaluate possible quantitative changes in retinal and choriocapillary blood flow utilizing optical coherence tomography angiography (OCTA) imaging in healthy study subjects during the Valsalva maneuver (VM). METHODS OCTA imaging with a ZEISS PlexElite 9000 on one eye was performed. OCTA images were acquired before VM and 5 seconds after. Images were segmented and underwent projection removal using algorithms supplied by the manufacturer. Analysis of vessel density (VD) and vessel length density (VLD) were performed on superficial (SCP) and deep capillary plexus (DCP) layer slabs using ImageJ. ImageJ was also utilized for analyzing flow voids (FVs) in the choriocapillary slabs. RESULTS Ten (8 right, 2 left) eyes of 10 (5 male, 5 female) healthy study subjects were included. Pre-VM, -VD, and -VLD were 0.428 (± 0.291) and 17.871 mm-1 (± 2.22 mm-1) in the SCP and 0.423 (± 0.0213) and 23.850 mm-1 (± 1.023 mm-1) in the DCP. Pre-VM and -FV were measured at 19.686 (± 1.959). During VM, VD, and VLD in the SCP were 0.417 (± 0.024) and 17.376 mm-1 (± 2.007 mm-1), and in the DCP, 0.426 (± 0.221) and 23.944 mm-1 (± 1.021 mm-1), respectively. FV post-VM was 20.440 (± 2.062). A paired samples t-test test revealed no significant changes in any of the observed parameters. CONCLUSION We did not observe any significant changes in the VD, VLD, or FV. This might be due to autoregulatory processes in the ocular vasculature. Due to the small sample size, confidence intervals are comparatively large. Further study with more probands might yield different results.
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Affiliation(s)
| | - Timothy Hamann
- Department of Ophthalmology, University Hospital Zurich, Zurich, Switzerland
| | - Sandrine Zweifel
- Department of Ophthalmology, University Hospital Zurich, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland
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12
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Applications of Optical Coherence Tomography in the Ocular Diagnosis: From the Tear Film to the Sclera. Diagnostics (Basel) 2022; 12:diagnostics12030673. [PMID: 35328226 PMCID: PMC8947680 DOI: 10.3390/diagnostics12030673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 03/08/2022] [Indexed: 11/16/2022] Open
Abstract
The latest technological developments have radically impacted the daily practice of ophthalmologists, thanks to the advent of novel diagnostic tools that facilitate an early diagnosis and allow a better management of ocular disorders [...]
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13
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Feng J, Yang X, Xu M, Wang Y, Shi X, Zhang Y, Huang P. Association of Microvasculature and Macular Sensitivity in Idiopathic Macular Epiretinal Membrane: Using OCT Angiography and Microperimetry. Front Med (Lausanne) 2021; 8:655013. [PMID: 34869402 PMCID: PMC8635104 DOI: 10.3389/fmed.2021.655013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 10/14/2021] [Indexed: 11/15/2022] Open
Abstract
Purpose: To investigate the correlation between retinal capillary structure and macular function in patients with idiopathic epiretinal membrane (iERM) by using optical coherence tomography angiography (OCTA) and microperimetry. Methods: This retrospective and observational study included 30 idiopathic ERM eyes of 30 consecutive patients. OCTA was performed to evaluate macular microvasculature including the superficial capillary plexus, deep capillary plexus, and foveal avascular zone. Best corrected visual acuity (BCVA) and microperimetry were measured at baseline and 3 months after surgery. Associations between macular microvasculature and visual function were assessed. Results: Visual function including BCVA and macular sensitivity improved significantly at 3 months post-operatively (p < 0.001). At baseline, BCVA was positively correlated with foveal or parafoveal sensitivities and negatively correlated with central foveal thickness (p < 0.05). Pre-operative foveal sensitivity was significantly correlated with the vessel density of foveal or parafoveal superficial capillary plexus (p < 0.05). A multiple regression model revealed that pre-operative vessel density of foveal deep capillary plexus was an independent positive prognostic factor for post-operative BCVA (B = −0.020 ± 0.006, p = 0.006) and macular sensitivity (B = 0.200 ± 0.081, p = 0.027). Conclusion: Integrated evaluation of iERM by using OCTA and microperimetry shows an association between microvasculature and macular sensitivity. Pre-operative vessel density of foveal deep capillary plexus assessed by OCTA may be a potentially valuable prognostic factor for iERM surgery.
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Affiliation(s)
- Jingyang Feng
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Eye Diseases, Shanghai, China.,Shanghai Key Laboratory of Fundus Disease, Shanghai, China.,Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
| | - Xiaotong Yang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Eye Diseases, Shanghai, China
| | - Mengqiao Xu
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuwei Wang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiang Shi
- Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China
| | - Yumeng Zhang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Peirong Huang
- Department of Ophthalmology, Shanghai General Hospital (Shanghai First People's Hospital), Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Eye Diseases, Shanghai, China.,Shanghai Key Laboratory of Fundus Disease, Shanghai, China.,Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai, China
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14
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Arumuganathan N, Wiest MRJ, Toro MD, Hamann T, Fasler K, Zweifel SA. Acute and subacute macular and peripapillary angiographic changes in choroidal and retinal blood flow post-intravitreal injections. Sci Rep 2021; 11:19381. [PMID: 34588594 PMCID: PMC8481476 DOI: 10.1038/s41598-021-98850-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 07/13/2021] [Indexed: 02/08/2023] Open
Abstract
Whether post injectional acute intraocular pressure (IOP) increase is associated with decreased peripapillary and macular perfusion is still under debate. Here, we investigated early changes in the choroidal and retinal blood flow using OCTA imaging in a cohort of patients undergoing anti-VEGF intravitreal injections (IVI) for macular edema following retinal vein occlusion and diabetic retinopathy. In this prospective single-center, observational study, the pre- and post-IVI changes in retinal perfusion were examined via assessment of vessel length density (VLD) and vessel density (VD) in deep and superficial capillary segmentations (DCP and SCP), foveal avascular zone (FAZ) in SCP, as well as flow signal deficits in the choriocapillaris segmentation. Mean IOP significantly changed over the study course (p = 0.000; ANOVA). Measurements at 5 min post-IVI (33.48 ± 10.84 mmHg) differed significantly from baseline (17.26 ± 2.41 mmHg, p = 0.000), while measurements from one day, one week, and one-month post-IVI did not (p = 0.907, p = 1.000 and p = 1.000 respectively). In comparison to baseline, no changes in OCTA parameters, including FAZ, VD, VLD, and FV, were detected 5 min post-IVI. No significant alterations in OCTA parameters were observed during study course. Increased IOP spikes were detected post-IVI; however, no potential permanent ischemic retinal damage was suspected.
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Affiliation(s)
- Nadhini Arumuganathan
- grid.412004.30000 0004 0478 9977Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland ,grid.7400.30000 0004 1937 0650University of Zurich, 8006 Zurich, Switzerland
| | - Maximilian Robert Justus Wiest
- grid.412004.30000 0004 0478 9977Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland ,grid.7400.30000 0004 1937 0650University of Zurich, 8006 Zurich, Switzerland
| | - Mario Damiano Toro
- grid.412004.30000 0004 0478 9977Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland ,grid.7400.30000 0004 1937 0650University of Zurich, 8006 Zurich, Switzerland ,grid.411484.c0000 0001 1033 7158Chair and Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20079 Lublin, Poland
| | - Timothy Hamann
- grid.412004.30000 0004 0478 9977Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland ,grid.7400.30000 0004 1937 0650University of Zurich, 8006 Zurich, Switzerland
| | - Katrin Fasler
- grid.412004.30000 0004 0478 9977Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland ,grid.7400.30000 0004 1937 0650University of Zurich, 8006 Zurich, Switzerland
| | - Sandrine Anne Zweifel
- grid.412004.30000 0004 0478 9977Department of Ophthalmology, University Hospital Zurich, 8091 Zurich, Switzerland ,grid.7400.30000 0004 1937 0650University of Zurich, 8006 Zurich, Switzerland
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15
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Koman-Wierdak E, Róg J, Brzozowska A, Toro MD, Bonfiglio V, Załuska-Ogryzek K, Karakuła-Juchnowicz H, Rejdak R, Nowomiejska K. Analysis of the Peripapillary and Macular Regions Using OCT Angiography in Patients with Schizophrenia and Bipolar Disorder. J Clin Med 2021; 10:4131. [PMID: 34575242 PMCID: PMC8472507 DOI: 10.3390/jcm10184131] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 01/16/2023] Open
Abstract
PURPOSE To measure RNFL and vasculature around the optic disc and in the macula in patients with schizophrenia (SZ) and bipolar disorder (BD) using optical coherence tomography angiography (OCTA). METHODS 24 eyes of patients with SZ and 16 eyes of patients with BD as well as 30 eyes of healthy subjects were examined with OCTA. The radiant peripapillary capillary (RPC) density and RNFL thickness were measured in the peripapillary area. Moreover, macular thickness and vessel density were measured in both superficial and deep layers. RESULTS Significantly decreased values of vessel density in the macular deep vascular complex were found in the eyes of patients with SZ, compared to BD and the control group. The macular thickness in the whole vascular complex and in the fovea was significantly lower in SZ and BD group than in the control group. The radiant peripapillary vascular density and RNFL thickness were similar across groups. CONCLUSIONS The retinal microvascular dysfunction occurs in the macula in patients with SZ and BD, but not around optic disc. OCTA can become an essential additional diagnostic tool in detection of psychiatric disorders.
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Affiliation(s)
- Edyta Koman-Wierdak
- Department of General Ophthalmology, Medical University of Lublin, 20-079 Lublin, Poland; (M.D.T.); (R.R.); (K.N.)
| | - Joanna Róg
- Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin, 20-079 Lublin, Poland; (J.R.); (H.K.-J.)
| | - Agnieszka Brzozowska
- Department of Mathematics and Medical Biostatistics, Medical University of Lublin, 20-079 Lublin, Poland;
| | - Mario Damiano Toro
- Department of General Ophthalmology, Medical University of Lublin, 20-079 Lublin, Poland; (M.D.T.); (R.R.); (K.N.)
- Department of Ophthalmology, University of Zurich, 8091 Zurich, Switzerland
| | - Vincenza Bonfiglio
- Department of Experimental Biomedicine and Clinical Neuroscience, Ophthalmology Section, University of Palermo, 90127 Palermo, Italy;
| | | | - Hanna Karakuła-Juchnowicz
- Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin, 20-079 Lublin, Poland; (J.R.); (H.K.-J.)
| | - Robert Rejdak
- Department of General Ophthalmology, Medical University of Lublin, 20-079 Lublin, Poland; (M.D.T.); (R.R.); (K.N.)
| | - Katarzyna Nowomiejska
- Department of General Ophthalmology, Medical University of Lublin, 20-079 Lublin, Poland; (M.D.T.); (R.R.); (K.N.)
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16
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Cunha AM, Teixeira D, Cabral D, Estrela-Silva S, Falcão-Reis F, Carneiro Â. Quantitative Optical Coherence Tomography Angiography Biomarkers for Alport Syndrome. Ophthalmologica 2021; 245:41-48. [PMID: 34469897 DOI: 10.1159/000519242] [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: 03/28/2021] [Accepted: 08/12/2021] [Indexed: 11/19/2022]
Abstract
PURPOSE The aim of this study was to evaluate microvascular abnormalities of patients with Alport syndrome (AS) using optical coherence tomography angiography (OCT-A) quantitative biomarkers. METHODS This was cross sectional, prospective evaluation of consecutive patients with AS and healthy subjects. AS diagnosis was performed by the genetic test. All participants underwent a retinal vasculature evaluation by spectral-domain optical coherence tomography (SD-OCT) and OCT-A of the macula. Quantitative analysis included whole vascular density, foveal avascular zone area, fractal dimension (FD), and lacunarity (LAC). RESULTS Ninety-four eyes were included in this study, 45 eyes from patients with AS and 49 eyes from healthy subjects. The pathogenic mutation in the COL4A5 gene on the chromosome X was found in 14 patients; the pathogenic autosomal recessive mutations in the COL4A3 gene were found in 9 patients. Quantitative evaluation demonstrated a significant difference between AS and healthy subjects on LAC of the superficial capillary plexus and deep capillary plexus (DCP) (p < 0.001 and p < 0.001, respectively) and on FD in the DCP (p < 0.001). CONCLUSION The DCP Alport patients have a higher vessel nonuniformity than DCP of healthy subjects. We hypothesize that endothelial cell lesion in the setting of low resistance at the DCP circuit could lead to long-term structural disorganization.
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Affiliation(s)
- Ana Maria Cunha
- Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal
| | | | - Diogo Cabral
- Instituto de Oftalmologia Dr. Gama Pinto, Lisboa, Portugal
| | - Sérgio Estrela-Silva
- Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal.,Department of Surgery and Physiology, Faculty of Medicine of University of Porto, Porto, Portugal
| | - Fernando Falcão-Reis
- Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal.,Department of Surgery and Physiology, Faculty of Medicine of University of Porto, Porto, Portugal
| | - Ângela Carneiro
- Department of Ophthalmology, Centro Hospitalar Universitário de São João, Porto, Portugal.,Department of Surgery and Physiology, Faculty of Medicine of University of Porto, Porto, Portugal
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17
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Wiest MRJ, Toro MD, Nowak A, Baur J, Fasler K, Hamann T, Al-Sheikh M, Zweifel SA. Globotrioasylsphingosine Levels and Optical Coherence Tomography Angiography in Fabry Disease Patients. J Clin Med 2021; 10:jcm10051093. [PMID: 33807900 PMCID: PMC7961664 DOI: 10.3390/jcm10051093] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/16/2021] [Accepted: 03/04/2021] [Indexed: 12/12/2022] Open
Abstract
Background: To date, there are no studies associating the dried blood spot (DBS) levels of globotrioasylsphingosine (lysoGb3) with quantitative optical coherence tomography angiography (OCTA) parameters in Fabry disease (FD) patients. Here, we aimed to investigate the association between OCTA vessel density (VD), vessel length density (VLD) with DBS lysoGb3. Methods: A retrospective, single center analysis of all consecutive FD patients enrolled at the Department of Ophthalmology of the University Hospital of Zurich from 1 December 2017 to 9 September 2020. An association between VD and VLD detected by OCTA and lysoGb3 was investigated using a linear mixed model. Results: A total of 57 FD patients (23 male, 34 female; 109 eyes) were included. Forty-one patients suffered from the classic phenotype and 16 from the later-onset phenotype. LysoGb3 inversely correlated with VD and VLD in both the superficial (VD: p = 0.034; VLD: p = 0.02) and deep capillary plexus (VD: p = 0.017; VLD: p = 0.018) in the overall FD cohort. Conclusions: Our study shows an association between lysoGb3 and OCTA VD and VLD. This supports the hypothesis that quantitative OCTA parameters might be useful as diagnostic biomarkers for evaluating systemic involvement in FD, and possibly other diseases.
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Affiliation(s)
- Maximilian Robert Justus Wiest
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.); (J.B.); (K.F.); (T.H.); (M.A.-S.)
| | - Mario Damiano Toro
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.); (J.B.); (K.F.); (T.H.); (M.A.-S.)
- Faculty of Medical Sciences, Collegium Medicum, Cardinal Stefan Wyszyński University, 01815 Warsaw, Poland
| | - Albina Nowak
- Department of Endocrinology and Clinical Nutrition, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland;
- Department of Internal Medicine, Psychiatry University Clinic Zurich, 8091 Zurich, Switzerland
| | - Joel Baur
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.); (J.B.); (K.F.); (T.H.); (M.A.-S.)
| | - Katrin Fasler
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.); (J.B.); (K.F.); (T.H.); (M.A.-S.)
| | - Timothy Hamann
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.); (J.B.); (K.F.); (T.H.); (M.A.-S.)
| | - Mayss Al-Sheikh
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.); (J.B.); (K.F.); (T.H.); (M.A.-S.)
| | - Sandrine Anne Zweifel
- Department of Ophthalmology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland; (M.R.J.W.); (M.D.T.); (J.B.); (K.F.); (T.H.); (M.A.-S.)
- Correspondence: ; Tel.: +41-44-255-87-94
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