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      Pseudophakic Cystoid Macular Edema

      review-article
      ,
      Ophthalmologica
      S. Karger AG
      Cystoid macular edema, Inflammatory mediators, Management, Cataract surgery

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          Abstract

          Cataract surgery is an efficient procedure, and is generally associated with good visual results. Nevertheless, cystoid macular edema (CME) may develop, and this can result in suboptimal postoperative vision. Many factors are considered to contribute to its development, and although the treatment options depend upon the underlying cause of CME, the usual therapeutic approach for prophylaxis and treatment of CME is directed towards blocking the inflammatory mediators. This article provides a review of possible risk factors, pathogeneses, incidence rates, and methods of diagnosis, as well as the current guidelines for managing CME.

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          Most cited references50

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          Optical coherence tomography of the human retina.

          To demonstrate optical coherence tomography for high-resolution, noninvasive imaging of the human retina. Optical coherence tomography is a new imaging technique analogous to ultrasound B scan that can provide cross-sectional images of the retina with micrometer-scale resolution. Survey optical coherence tomographic examination of the retina, including the macula and optic nerve head in normal human subjects. Research laboratory. Convenience sample of normal human subjects. Correlation of optical coherence retinal tomographs with known normal retinal anatomy. Optical coherence tomographs can discriminate the cross-sectional morphologic features of the fovea and optic disc, the layered structure of the retina, and normal anatomic variations in retinal and retinal nerve fiber layer thicknesses with 10-microns depth resolution. Optical coherence tomography is a potentially useful technique for high depth resolution, cross-sectional examination of the fundus.
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            Clinical pseudophakic cystoid macular edema. Risk factors for development and duration after treatment.

            To characterize the incidence, duration, and risk factors for and outcome of cystoid macular edema (CME) after cataract surgery and investigate the effects of treatment regimens on visual outcome and duration. University-based comprehensive ophthalmology practice. This study included 1659 consecutive cataract surgeries performed by residents between 2001 and 2006. Cases were classified according to the presence of CME. Subset analysis excluded patients with diabetes mellitus (DM). The CME groups were analyzed according to type of treatment to compare duration of CME and final best corrected visual acuity. The incidence of postoperative CME was 2.35% (39/1659), and history of retinal vein occlusion (RVO) was predictive of postoperative CME (odds ratio [OR], 47.12; P<.001). When patients with DM were excluded, the incidence of CME was 2.14% (29/1357) and history of RVO (OR, 31.75; P<.001), epiretinal membrane (ERM) (OR, 4.93; P<.03), and preoperative prostaglandin use (OR, 12.45; P<.04) were predictive of postoperative CME. Patients with DM and/or intraoperative complications did not have an increased risk for CME when treated with prophylactic postoperative nonsteroidal antiinflammatory drugs (NSAIDs) for 3 months. Groups treated with NSAIDs plus a steroid had significantly shorter resolution times than the untreated group (P = .004). A history of RVO, ERM, and preoperative prostaglandin use were associated with an increased risk for pseudophakic CME. Treatment with NSAIDs plus steroids was associated with faster resolution of CME than no treatment. Treating high-risk patients with NSAIDs after cataract surgery decreases the incidence of postoperative CME to that of patients who are not at high risk.
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              Safety and efficacy of phacoemulsification compared with manual small-incision cataract surgery by a randomized controlled clinical trial: six-week results.

              To compare the efficacy, safety, and refractive errors of astigmatism after cataract surgery by phacoemulsification and manual small-incision cataract surgery techniques. Masked randomized control clinical trial. Four hundred eyes of 400 patients, 1:1 randomization with half in each arm of the trial. A total of 400 eyes was assigned randomly to either phacoemulsification or small-incision groups after informed consent and were operated on by 4 surgeons. They were masked to the technique of surgery before, during, and after cataract surgery and followed up to 1 year after surgery. The intraoperative and postoperative complications, uncorrected and best-corrected visual acuity, and astigmatism were recorded at 1 and 6 weeks postoperatively. The proportion of patients achieving visual acuity better than or equal to 6/18 with and without spectacles after cataract surgery in the operated eye up to 6 weeks, postoperative astigmatism, and complications during and after surgery. This article reports clinical outcomes up to 6 weeks. Three hundred eighty-three of 400 (95.75%) patients completed the 1-week follow-up, and 372 of 400 (93%) patients completed the 6-week follow-up. One hundred thirty-one of 192 (68.2%) patients in the phacoemulsification group and 117 of 191 (61.25%) patients in the small-incision group had uncorrected visual acuity better than or equal to 6/18 at 1 week (P = 0.153). One hundred fifty of 185 (81.08%) patients of the phacoemulsification group and 133 of 187 (71.1%) patients of the small-incision group (P = 0.038) were better than or equal to 6/18 at the 6-week follow-up for presenting visual activity. Visual acuity improved to > or = 6/18 with best correction in 182 of 185 patients (98.4%) and 184 of 187 (98.4%) patients (P = 0.549), respectively. Poor outcome (postoperative visual acuity < 6/60) was noted in 1 of 185 (0.5%) in the phacoemulsification group and none in the small-incision group. The mode of astigmatism was 0.5 diopters (D) for the phacoemulsification group and 1.5 D for the small-incision group, and the average astigmatism was 1.1 D and 1.2 D, respectively. There was an intra-surgeon variation in astigmatism. The phacoemulsification group had 7 posterior capsular rents compared with 12 in the small-incision group, but the phacoemulsification group had more corneal edema on the first postoperative day. Both the phacoemulsification and the small-incision techniques are safe and effective for visual rehabilitation of cataract patients, although phacoemulsification gives better uncorrected visual acuity in a larger proportion of patients at 6 weeks.
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                Author and article information

                Journal
                OPH
                Ophthalmologica
                10.1159/issn.0030-3755
                Ophthalmologica
                S. Karger AG
                0030-3755
                1423-0267
                2012
                January 2012
                15 September 2011
                : 227
                : 2
                : 61-67
                Affiliations
                Association for Innovation and Biomedical Research on Light and Image, Department of Ophthalmology, University Hospital of Coimbra, Institute of Biomedical Research on Light and Image, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
                Author notes
                *Conceição Lobo, AIBILI, Faculty of Medicine, University of Coimbra-IBILI, Depart. Ophthalmology, University Hospital of Coimbra, Azinhaga Sta Comba, Celas, PT– 3000-548 Coimbra (Portugal), Tel. +351 239 480 100, E-Mail clobofonseca@gmail.com
                Article
                331277 Ophthalmologica 2012;227:61–67
                10.1159/000331277
                21921587
                e5088cb5-7cec-4e30-b8d9-0d3a53215e4e
                © 2011 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. 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
                : 28 July 2011
                : 29 July 2011
                Page count
                Pages: 7
                Categories
                Review

                Vision sciences,Ophthalmology & Optometry,Pathology
                Management,Cataract surgery,Cystoid macular edema,Inflammatory mediators

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