1,720,964 research outputs found
Impact of glaucoma and glaucoma surgery on quality of life
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V.P. Erichev, A.V. Volzhanin
Scientific Research Institute of Eye Diseases, Moscow, Russian Federation
Glaucoma is a chronic, incurable disease managed by controlling intraocular pressure (IOP). Meanwhile, vision loss in glaucoma and treatments affect the quality of life (QoL). Many studies on QoL in patients with glaucoma are now available. Standardized questionnaires and established non-linear relationships between QoL in glaucoma and clinically assessed quantitative parameters (e.g., visual acuity, visual fields, etc.) are significant achievements. Although treatments (pharmacotherapy or surgical interventions) generally reduce IOP, their adverse reactions affect QoL and treatment adherence. Surgical interventions provide the most potent IOP-lowering effect. However, surgery most affects QoL due to local symptoms and psychological factors (particularly at the early stages of glaucoma). Given the emergence of minimally invasive procedures, the importance of studying de facto QoL after glaucoma surgery is resurrected.
Keywords: quality of life, glaucoma, trabeculectomy, minimally invasive glaucoma surgery, neuroprotective therapy.
For citation: Erichev V.P., Volzhanin A.V. Impact of glaucoma and glaucoma surgery on quality of life. Russian Journal of Clinical Ophthalmology. 2022;22(1):44–50 (in Russ.). DOI: 10.32364/2311-7729-2022-22-1-44-50.
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Morphological and functional retinal changes in postoperative hypotony
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V.P. Erichev, A.A. Antonov, A.A. Vitkov, E.A. Ragozina, A.V. Volzhanin
Scientific Research Institute of Eye Diseases, Moscow, Russian Federation
Aim: to analyze the retinal microvascular network changes in hypotony maculopathy after non-penetrating deep sclerectomy (NPDS).
Patients and Methods: the study enrolled 35 patients (35 eyes) with uncontrolled glaucoma stages II and III in whom the intraocular pressure (IOP) level was less than 10 mm Hg after NPDS. In addition to a standard eye exam, all patients underwent optical coherence tomography angiography (OCTA) before and one day after surgery. In addition, the radial peripapillary capillary (RPC) network vessel density (VD) on 4×4-mm optic nerve scans, superficial vascular plexus (SVP) VD on 6×6-mm macular scans, and foveal avascular zone (FAZ) area on 3×3-mm scans were evaluated.
Results: IOP-lowering effect was reported in all patients, i.e., IOP level reduced by, on average, 17.7±8.3 mm Hg. In 15 patients, baseline OCTA parameters worsened (group 1). In 17 patients, OCTA parameters improved (group 2). In 3 patients, OCTA parameters remained unchanged (group 3). In group 1, parafoveal VD reduced by 1.5% [2.45%; 0.85%] in the superior sector and 1.3% [1.75%; 0.85%] in the inferior sector. Peripapillary VD reduced by 0.6% [2.0%; 0.1%] in the superior sector and 1.1% [2.4%; 0.0%] in the inferior sector. In group 2, parafoveal VD improved by 0.85% [0.0%; 1.75%] in the superior sector and 1.2% [0.68%; 2.6%] in the inferior sector. Peripapillary VD improved by 1.2% [0.18%; 2.0%] in the superior sector and 0.95% [0.05%; 1.75%] in the inferior sector. IOP levels were similar. No correlations between OCTA parameters and IOP levels were revealed. Postoperatively, the FAZ area remained unchanged.
Conclusions: postoperative hypotoni a has a positive and negative impact on the retinal microvascular network. OCTA findings after NPDS demonstrate no correlations with IOP levels. Further studies are needed to identify prognostic factors of hypotony maculopathy and assess its long-term effects on retinal vessels.
Keywords: glaucoma, non-penetrating deep sclerectomy, hypotony maculopathy, OCTA.
For citation: Erichev V.P., Antonov A.A., Vitkov A.A. et al. Morphological and functional retinal changes in postoperative hypotony. Russian Journal of Clinical Ophthalmology. 2021;21(4):187–193 (in Russ.). DOI: 10.32364/2311-7729-2021-21-4-187-193.
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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