1,721,005 research outputs found
Intraocular perfluorodecalin and silicone oil tamponade (double filling) in the management of complicated retinal detachment: functional and anatomical outcomes using small-gauge surgery
No full textPurpose To describe the functional and anatomical results of complicated retinal detachment (RD) treated with small-gauge pars plana vitrectomy (PPV) and combined perfluorodecalin and polydimethylsiloxane tamponade (double filling, DF). Methods Retrospective analysis of consecutive patients with complex RD (severe proliferative vitreoretinopathy, inferior/posterior/giant retinal tears, and traumatic detachments) treated with small-gauge PPV, membrane peeling, and DF at the Department of Ophthalmology at San Gerardo Hospital, Monza, Italy. Main outcome measures included best-corrected visual acuity (BCVA), rates of retinal reattachment, and complications. Results This study included 15 patients with a median follow-up (FU) of 6 months (range 1-22). Three patients with early retinal redetachment under tamponade and FU shorter than 3 months were excluded from the final functional analysis, but they were considered anatomical failure. At the last examination, BCVA improved in 50% of patients and remained stable in 25% of patients and anatomical success was achieved in 73% of eyes, 64% of them without any endotamponade. Three eyes had retinal redetachment after perfluorodecalin/silicone oil exchange because of diffuse proliferative vitreoretinopathy (PVR) and required reoperation to achieve retinal attachment. In eyes with anatomical success, macular pucker was the most frequent long-term complication (27%). Conclusion In the management of complex RD, small-gauge pars plana vitrectomy, and double filling endotamponade using wide-angle viewing systems was a well-tolerated and effective technique to preserve visual acuity and achieve anatomical success
Atypical unilateral exudative retinal detachment in a child affected by tuberous sclerosis
No full textIntroduction: Tuberous sclerosis complex (TSC) is a rare hereditary phakomatosis. The clinical features can include benign growths in the central nervous system, tumors of various visceral organs, and retinal or optic disc astrocytic hamartomas in the nerve fiber layer. Here we present the case of a child with known TSC developing Coats-like manifestations. Case description: A 22-month-old girl with known TSC and retinal hamartoma followed since birth presented for the development of exotropia and leukocoria in the left eye. Fundus examination of the left eye showed blurred optic disc, macular star, and yellow retinal exudation in the temporal area. In addition, the left eye showed marked retinal vascular tortuosity and telangiectasias. The patient underwent brain and orbit magnetic resonance imaging, revealing heterotopic gray matter nodulations along ependyma of both lateral ventricles, with partial calcification, and a posterior flattening of the left eye. Conclusion: This report shows a rare case of Coats-like disease in a child with tuberous sclerosis. In case of presence of Coats' manifestations associated with atypical retinal or systemic findings, genetic diseases should be considered in the differential diagnosis
La noce recisa ne i fvnerali del fù signor marchese Alessandro Fachenetti senatore di Bologna : celebrati nella chiesa dei santi Gregorio, e Siro de i rr. pp. ministri de gl'infermi.
No full textIllustration: folded plate (impression size 57 1/2 x 37 1/2 cm.) depicting the catafalque, engraved by Domenico Maria Muratori after Bartolomeo Veronese.Woodcuts: floriated title-vignette and initial.The text describes the funeral decorations and emblems by Gio. Filippo Bezzi and the catafalque by Bartolomeo Veronese (cf. A3 verso).Pagination includes the front and the final blank leaves.Mode of access: Internet
Refining the Removal of Perfluorocarbon Liquid Remnants Through Negative Staining With Vital Dyes
No full textThe complete removal of perfluorocarbon liquid (PFCL) after complex vitreoretinal surgery can be a challenging task. However, it remains a crucial step to avoid several ocular complications associated with retained PFCL. In this report, the authors describe a simple and effective technique to highlight the presence of retained PFCL bubbles in the epiretinal space through negative staining with vital dyes
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Optical Coherence Tomography Angiography of Retinal Cavernous Hemangioma
No full textRetinal cavernous hemangioma is a rare, benign, retinal tumor characterized by angiomatous proliferation of vessels within the inner retina or the optic disc.1 Here we report a case of retinal cavernous hemangioma on the margin of the optic disc in the right eye of a 61-year-old asymptomatic female. The lesion was studied with multimodal imaging which included structural optical coherence tomography, fluorescein angiography, blue fundus auto-fluorescence, optical coherence tomography angiography (OCTA) (DRI OCT Triton; Topcon, Tokyo, Japan) and visual field examination. Blood circulation inside retinal cavernous hemangioma lesion is typically low-stagnant.2 However, OCTA demonstrated blood flow inside the lesion, illustrating its vascular circulation.3 Visual field was within the normal limits, except from a slight enlargement of the blind spot. [Ophthalmic Surg Lasers Imaging Retina. 2017;48:684-685.]
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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