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      Five-year follow-up of secondary iris-claw intraocular lens implantation for the treatment of aphakia: Anterior chamber versus retropupillary implantation

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          Abstract

          Background

          Though several procedures of IOL implantation have been described (sutured scleral fixation, intra-scleral fixation, angle-supported anterior chamber, and anterior chamber or retropupillary iris-claw IOLs), there are no randomized trials which are comparing different techniques. Hence, the surgical treatment of aphakia still remains controversial and challenging. The purpose of this study was to compare the long-term efficacy and the rate of complications of anterior versus posterior Iris-claw intraocular lenses (IOL) implantation to correct for the treatment of aphakia without sufficient capsule support.

          Methods and findings

          Consecutive eyes having secondary implantation of aphakic iris-fixated IOLs with a follow-up of at least 5 years were considered. Mean correct distance visual acuity (CDVA) changes, percentage of eyes with CDVA improvement, mean corneal endothelial cell density (CECD) loss and the rate of other complications were used for statistical analysis. The study evaluated a total of 180 eyes (Group A: 87 anterior chamber iris-claw fixation, Group B: 93 retropupillary iris-claw implantation) of 180 consecutive different patients, with aphakia of various reasons. CDVA improved significantly in both groups after surgery (P<0.001, ANOVA), and was remarkably higher than baseline in both groups from first week and during the entire follow-up (P<0.001, Tukey’s Honest Significant Difference). There was no statistically significant difference in CDVA between the two groups during each follow-up visits (P = NS, unpaired t-test) and in the CDVA improvement percentage between the two groups (P = 0.882, Chi-square test). No significant changes in CECD were noted after surgery in both groups (ANOVA Group A: P = 0.067, Group B: P = 0.330P). No intra-operative complications occurred in both groups. There was no statistically significant difference in the rate of complications between the two groups (P = NS, Chi-square test), except for pigment precipitates which were higher in Group A (P<0.05, Chi-square test).

          Conclusions

          Five-year follow-up shows that secondary implantation of aphakic IOLs is effective and safe for the correction treatment of aphakia in eyes without capsule support.

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          Most cited references49

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          Flanged Intrascleral Intraocular Lens Fixation with Double-Needle Technique.

          Shin Yamane, Shimpei Sato, Kazuaki Kadonosono … (2017)
          To report the clinical outcomes of a new technique for transconjunctival intrascleral fixation of an intraocular lens (IOL).
          Article 0 comments Cited 154 times – based on 0 reviews     Review now
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            Long-term outcome of combined pars plana vitrectomy and scleral fixated sutured posterior chamber intraocular lens implantation.

            David Charteris, Brendan J Vote, Catey Bunce … (2006)
            To investigate the long-term visual outcome and the complication rate following transscleral suture fixation of posterior chamber intraocular lenses (sutured PC-IOLs). A retrospective case-series descriptive study. Records of patients who underwent combined pars plana vitrectomy and sutured PC-IOLs at Moorfields Eye Hospital and who had at least 12 months of follow-up were examined for recorded complications. Sixty-one eyes of 48 patients (33 males and 15 females) were identified and included in the analysis, with mean follow-up of 6 years. The mean final best-corrected visual acuity remained at preoperative levels (P=.211) and was largely determined by the underlying ocular pathology before sutured PC-IOL. Overall 30 of 61 (49%) eyes, two or more procedures were performed to reverse a significant peri- or postoperative complication. Breakage of polypropylene sutures was the main indication accounting for 17 of 30 (57%) of those reoperations. Subgroup analysis showed that younger patients were more likely to suffer the above complication (P=.009). The multivariate analysis also showed that longer follow-up was significantly associated with suture breakage (P=.014), with the mean time to breakage approximately 4 years after surgery. Long-term follow-up of patients undergoing sutured PC-IOLs appears to be associated with a high rate of postoperative complications and significant need for further surgery, which should be discussed during their informed consent process.
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              Intraocular lens implantation in the absence of capsular support: a report by the American Academy of Ophthalmology.

              R Ariyasu, Christopher Karp, … (2003)
              This review was conducted to determine the safety and efficacy of open-loop anterior chamber, scleral-sutured posterior chamber, and iris-sutured posterior chamber intraocular lenses (IOLs) in eyes with inadequate capsular support for posterior chamber implantation in the capsular bag or ciliary sulcus. It also attempted to determine whether there is a preferred IOL or fixation site of choice in eyes with inadequate capsular support. A literature search conducted for the years 1980 to 2001 yielded 189 citations related to IOL implantation in the absence of capsular support. An update search, conducted in March 2002, yielded an additional 28 articles. The Anterior Segment Panel members reviewed these abstracts and selected 148 articles of possible clinical relevance for review. Of these, 89 were considered sufficiently clinically relevant for the panel methodologist to review and rate according to the strength of evidence. A level I rating was assigned to properly conducted, well-designed, randomized clinical trials; a level II rating was assigned to well-designed cohort and case-control studies; and a level III rating was assigned to case series. Articles comparing the safety and efficacy of the IOL type and fixation site were further evaluated for the quality of the statistical methods used in the study. Studies with a rating of A or B were considered acceptable, C was borderline, and D and F were considered unacceptable as medical evidence. Forty-three articles with data concerning outcome of IOL insertion in eyes with inadequate capsular support had an evidence rating of level III or higher and were used in the final review of the safety and efficacy of one or more lens types and/or fixation sites. Seven articles had data about more than one lens type. Six had a statistical method rating of C or higher and were used to evaluate differences in visual outcomes and complication rates between lens types and fixation sites. The literature supports the safe and effective use of open-loop anterior chamber, scleral-sutured posterior chamber, and iris-sutured posterior chamber IOLs for the correction of aphakia in eyes without adequate capsular support for placement of a posterior chamber lens in the capsular bag or ciliary sulcus. At this time, there is insufficient evidence to demonstrate the superiority of one lens type or fixation site. Precise determination of small differences in visual outcome or complication rates will require a large prospective, randomized clinical trial.
              Article 0 comments Cited 64 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Mario Damiano Toro:
                ORCID: http://orcid.org/0000-0001-7152-2613
                Role: ConceptualizationRole: MethodologyRole: Writing – original draftRole: Writing – review & editing
                Antonio Longo: Role: Data curationRole: Formal analysis
                Teresio Avitabile: Role: ConceptualizationRole: Supervision
                Katarzyna Nowomiejska: Role: Supervision
                Caterina Gagliano: Role: Investigation
                Sarah Tripodi: Role: Data curation
                Tomasz Choragiewicz: Role: Supervision
                Agnieszka Kaminska: Role: Validation
                Michele Figus: Role: Supervision
                Chiara Posarelli: Role: Methodology
                Matteo Forlini: Role: Methodology
                Anselm Gerhard Maria Jünemann: Role: Writing – review & editing
                Michele Reibaldi: Role: Project administration
                Robert Rejdak: Role: Project administration
                Asaf Achiron: Role: Editor
                Journal
                Journal ID (nlm-ta): PLoS One
                Journal ID (iso-abbrev): PLoS ONE
                Journal ID (publisher-id): plos
                Journal ID (pmc): plosone
                Title: PLoS ONE
                Publisher: Public Library of Science (San Francisco, CA USA )
                ISSN (Electronic): 1932-6203
                Publication date (Electronic): 10 April 2019
                Publication date Collection: 2019
                Volume: 14
                Issue: 4
                Electronic Location Identifier: e0214140
                Affiliations
                [1 ] Department of Ophthalmology, University of Catania, Catania, Italy
                [2 ] Department of General Ophthalmology, Medical University of Lublin, Lublin, Poland
                [3 ] Institute for Ophthalmic Research, University Eye Hospital, Tuebingen, Germany
                [4 ] Faculty of Medicine, Collegium Medicum, Cardinal Stefan Wyszynski University, Warsaw, Poland
                [5 ] Department of Surgical, Medical, Molecular Pathology and of the Critical Area, University of Pisa, Pisa, Italy
                [6 ] Institute of Ophthalmology, University of Parma, Parma, Italy
                [7 ] Department for Ophthalmology, University Medicine Rostock, Rostock, Germany
                Edith Wolfson Medical Center, ISRAEL
                Author notes

                Competing Interests: The authors have declared that no competing interests exist.

                Author information
                http://orcid.org/0000-0001-7152-2613
                Article
                Publisher ID: PONE-D-18-28487
                DOI: 10.1371/journal.pone.0214140
                PMC ID: 6457484
                PubMed ID: 30970023
                SO-VID: 52bf878c-4ab2-4eb2-ad68-024eae5b0a65
                Copyright © © 2019 Toro et al
                License:

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                Date received : 30 September 2018
                Date accepted : 7 March 2019
                Page count
                Figures: 0, Tables: 5, Pages: 13
                Funding
                The authors received no specific funding for this work.
                Categories
                Subject: Research Article
                Subject: Biology and Life Sciences
                Subject: Anatomy
                Subject: Head
                Subject: Eyes
                Subject: Medicine and Health Sciences
                Subject: Anatomy
                Subject: Head
                Subject: Eyes
                Subject: Biology and Life Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Eyes
                Subject: Medicine and Health Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Eyes
                Subject: Biology and Life Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Ocular Anatomy
                Subject: Cornea
                Subject: Medicine and Health Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Ocular Anatomy
                Subject: Cornea
                Subject: Medicine and Health Sciences
                Subject: Surgical and Invasive Medical Procedures
                Subject: Medicine and Health Sciences
                Subject: Surgical and Invasive Medical Procedures
                Subject: Ophthalmic Procedures
                Subject: Intraocular Lens Implantation
                Subject: Biology and Life Sciences
                Subject: Cell Biology
                Subject: Cellular Types
                Subject: Animal Cells
                Subject: Epithelial Cells
                Subject: Endothelial Cells
                Subject: Biology and Life Sciences
                Subject: Anatomy
                Subject: Biological Tissue
                Subject: Epithelium
                Subject: Epithelial Cells
                Subject: Endothelial Cells
                Subject: Medicine and Health Sciences
                Subject: Anatomy
                Subject: Biological Tissue
                Subject: Epithelium
                Subject: Epithelial Cells
                Subject: Endothelial Cells
                Subject: Medicine and Health Sciences
                Subject: Surgical and Invasive Medical Procedures
                Subject: Ophthalmic Procedures
                Subject: Cataract Surgery
                Subject: Biology and Life Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Ocular Anatomy
                Subject: Iris
                Subject: Medicine and Health Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Ocular Anatomy
                Subject: Iris
                Subject: Biology and Life Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Ocular Anatomy
                Subject: Eye Lens
                Subject: Medicine and Health Sciences
                Subject: Anatomy
                Subject: Ocular System
                Subject: Ocular Anatomy
                Subject: Eye Lens
                Custom metadata
                Data Availability All relevant data are within the paper.

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                ScienceOpen disciplines: Uncategorized

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