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      Recurrent Diabetic Macular Edema: What to Do

      case-report

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          Abstract

          Diabetic macular edema (DME) is a leading cause of blindness in the working population. Herein, we report the case of a patient with recurrent DME for about 6 years, uncontrolled by several medical and surgical treatments, that was successfully treated with a single sustained-release fluocinolone acetonide intravitreal implant in her right eye. The affected eye had presented a visual acuity of 2/10 and a central macular thickness of 488 µm prior to the injection. After treatment with the fluocinolone acetonide intravitreal implant, the patient’s right eye presented an improvement in best corrected visual acuity to 6/10 and a reduction of central macular thickness to 198 µm. These functional and anatomical results were continuous and sustained during a follow-up period of more than 12 months, and with an acceptable and manageable safety profile. These results show that fluocinolone acetonide intravitreal implantation is an effective treatment option in DME and should be considered in the DME treatment pathway.

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          Global Prevalence and Major Risk Factors of Diabetic Retinopathy

          Joanne Yau, Sophie L. Rogers, Ryo Kawasaki … (2012)
          OBJECTIVE To examine the global prevalence and major risk factors for diabetic retinopathy (DR) and vision-threatening diabetic retinopathy (VTDR) among people with diabetes. RESEARCH DESIGN AND METHODS A pooled analysis using individual participant data from population-based studies around the world was performed. A systematic literature review was conducted to identify all population-based studies in general populations or individuals with diabetes who had ascertained DR from retinal photographs. Studies provided data for DR end points, including any DR, proliferative DR, diabetic macular edema, and VTDR, and also major systemic risk factors. Pooled prevalence estimates were directly age-standardized to the 2010 World Diabetes Population aged 20–79 years. RESULTS A total of 35 studies (1980–2008) provided data from 22,896 individuals with diabetes. The overall prevalence was 34.6% (95% CI 34.5–34.8) for any DR, 6.96% (6.87–7.04) for proliferative DR, 6.81% (6.74–6.89) for diabetic macular edema, and 10.2% (10.1–10.3) for VTDR. All DR prevalence end points increased with diabetes duration, hemoglobin A1c, and blood pressure levels and were higher in people with type 1 compared with type 2 diabetes. CONCLUSIONS There are approximately 93 million people with DR, 17 million with proliferative DR, 21 million with diabetic macular edema, and 28 million with VTDR worldwide. Longer diabetes duration and poorer glycemic and blood pressure control are strongly associated with DR. These data highlight the substantial worldwide public health burden of DR and the importance of modifiable risk factors in its occurrence. This study is limited by data pooled from studies at different time points, with different methodologies and population characteristics.
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            Photocoagulation for diabetic macular edema. Early Treatment Diabetic Retinopathy Study report number 1. Early Treatment Diabetic Retinopathy Study research group.

            (1985)
            Data from the Early Treatment Diabetic Retinopathy Study (ETDRS) show that focal photocoagulation of "clinically significant" diabetic macular edema substantially reduces the risk of visual loss. Focal treatment also increases the chance of visual improvement, decreases the frequency of persistent macular edema, and causes only minor visual field losses. In this randomized clinical trial, which was supported by the National Eye Institute, 754 eyes that had macular edema and mild to moderate diabetic retinopathy were randomly assigned to focal argon laser photocoagulation, while 1,490 such eyes were randomly assigned to deferral of photocoagulation. The beneficial effects of treatment demonstrated in this trial suggest that all eyes with clinically significant diabetic macular edema should be considered for focal photocoagulation. Clinically significant macular edema is defined as retinal thickening that involves or threatens the center of the macula (even if visual acuity is not yet reduced) and is assessed by stereo contact lens biomicroscopy or stereo photography. Follow-up of all ETDRS patients continues without other modifications in the study protocol.
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              The RESTORE study: ranibizumab monotherapy or combined with laser versus laser monotherapy for diabetic macular edema.

              Paul Mitchell, Francesco Bandello, Ursula Schmidt-Erfurth … (2011)
              To demonstrate superiority of ranibizumab 0.5 mg monotherapy or combined with laser over laser alone based on mean average change in best-corrected visual acuity (BCVA) over 12 months in diabetic macular edema (DME). A 12-month, randomized, double-masked, multicenter, laser-controlled phase III study. We included 345 patients aged ≥18 years, with type 1 or 2 diabetes mellitus and visual impairment due to DME. Patients were randomized to ranibizumab + sham laser (n = 116), ranibizumab + laser (n = 118), or sham injections + laser (n = 111). Ranibizumab/sham was given for 3 months then pro re nata (PRN); laser/sham laser was given at baseline then PRN (patients had scheduled monthly visits). Mean average change in BCVA from baseline to month 1 through 12 and safety. Ranibizumab alone and combined with laser were superior to laser monotherapy in improving mean average change in BCVA letter score from baseline to month 1 through 12 (+6.1 and +5.9 vs +0.8; both P 73 (20/40 Snellen equivalent) with ranibizumab (22.6% and 53%, respectively) and ranibizumab + laser (22.9% and 44.9%) versus laser (8.2% and 23.6%). The mean central retinal thickness was significantly reduced from baseline with ranibizumab (-118.7 μm) and ranibizumab + laser (-128.3 μm) versus laser (-61.3 μm; both P<0.001). Health-related quality of life, assessed through National Eye Institute Visual Function Questionnaire (NEI VFQ-25), improved significantly from baseline with ranibizumab alone and combined with laser (P<0.05 for composite score and vision-related subscales) versus laser. Patients received ∼7 (mean) ranibizumab/sham injections over 12 months. No endophthalmitis cases occurred. Increased intraocular pressure was reported for 1 patient each in the ranibizumab arms. Ranibizumab monotherapy or combined with laser was not associated with an increased risk of cardiovascular or cerebrovascular events in this study. Ranibizumab monotherapy and combined with laser provided superior visual acuity gain over standard laser in patients with visual impairment due to DME. Visual acuity gains were associated with significant gains in VFQ-25 scores. At 1 year, no differences were detected between the ranibizumab and ranibizumab + laser arms. Ranibizumab monotherapy and combined with laser had a safety profile in DME similar to that in age-related macular degeneration. Copyright © 2011 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.
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                Author and article information

                Journal
                Journal ID (publisher-id): COP
                Journal ID (pmc): COP
                Journal ID (doi): 10.1159/issn.1663-2699
                Title: Case Reports in Ophthalmology
                Publisher: S. Karger AG
                ISSN (Electronic): 1663-2699
                Publication date Subscription-year: 2017
                Publication date Collection: September – December 2017
                Publication date (Electronic): 27 September 2017
                Volume: 8
                Issue: 3
                Pages: 465-474
                Affiliations
                Department of Ophthalmology, Hospital Pedro Hispano, Matosinhos, Portugal
                Author notes
                *Rita Santos Gonçalves, Department of Ophthalmology, Hospital Pedro Hispano, Rua Dr. Eduardo Torres, PT–4464-513 Senhora da Hora (Portugal), E-Mail rita.msgon@gmail.com
                Author information
                https://orcid.org/0000-0003-1452-7391
                Article
                Publisher ID: 480119 Pmcid ID: PMC5662951 Other ID: Case Rep Ophthalmol 2017;8:465–474
                DOI: 10.1159/000480119
                PMC ID: PMC5662951
                PubMed ID: 29118706
                SO-VID: 22ead19c-552b-417e-8de1-e85a809a19f0
                Copyright © © 2017 The Author(s). Published by S. Karger AG, Basel
                License:

                This article is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC). Usage and distribution for commercial purposes requires written permission. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                Date received : 09 June 2017
                Date accepted : 08 August 2017
                Page count
                Figures: 3, Tables: 1, Pages: 10
                Categories
                Subject: Case Report

                ScienceOpen disciplines: Vision sciences,Ophthalmology & Optometry,Pathology
                Keywords: Visual acuity,Macular edema,Intravitreal injection,Diabetic retinopathy
                Data availability:
                ScienceOpen disciplines: Vision sciences, Ophthalmology & Optometry, Pathology
                Keywords: Visual acuity, Macular edema, Intravitreal injection, Diabetic retinopathy

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