1,720,967 research outputs found
Clinical and ultrasound biomicroscopic features in iris melanocytoma.
No full textThe clinical and ultrasound biomicroscopic features of two cases of iris melanocytoma are evaluated. On ultrasound biomicroscopy examination, iris melanocytoma appears as a highly reflective nodular mass with a smooth or irregular surface and sharp and well-defined edges. Ultrasound biomicroscopy also allows clear visualization and measurement of the tumors. These findings were compared with clinical and histopathologic findings
Flap displacement during vitrectomy 24 months after laser in situ keratomileusis
No full textFlap displacement can occur during the first few days or, more rarely, as late as many months after laser in situ keratomileusis (LASIK). Although late flap dislodgment is usually the result of external accidental trauma, it has been reporterd in two cases during retinal surgery after epithelial debridement 4 and 5 months after LASIK and automated lamellar keratoplasty, respectively. We report a case of partial flap dislocation after epithelial debridement during vitrectomy 24 months after LASI
Congiuntival surface microscopic analysis on patients undergone trabeculectomy with or with. Oculusgen
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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
Ultrasound biomicroscopy before and after transscleral diode laser cyclophotocoagulation
No full textPurpose: To report the ultrasound biomicroscopic appearance of the ciliary body and ciliary processes before and after transscleral diode laser cyclophotocoagulation.
Methods: 14 eyes of 14 patients, ages 38 to 83 (mean 75) were studied with ultrasound biomicroscopy using a 50-MHz transducer. The patients was laid supine and the examination was performed preoperatively to establish the position of the ciliary body to ensure correct laser probe placement and postoperatively to image early and late ciliary body alterations after the procedure (1 week, 1, 6 and 12 months after treatment).
Results: Ultrasound biomicroscopy measurement of the distance from the ciliary body to the limbus was used to establish the position of the coagulative spots for cyclophotocoagulation on an individual basis in all patients, confirming the conventionally assumed 1.5 mm distance from the limbus. Ultrasound biomicroscopy did not permit visualization of structural alteration of the ciliary body after cyclophotocoagulation in 70% of eyes and showed atrophic and hyperreflective ciliary body in 30% at last follow-up
Conclusion: Ultrasound biomicroscopy is a non-invasive, safe and easy echographic technique that can show the outcome of the transscleral diode laser cyclophotocoagulation, suggesting the distance from the limbus of the ciliar body, to ensure correct laser probe placement. Our results should provide useful information on the value of the ultrasound biomicroscopic before and after transscleral diode laser cyclophotocoagulation
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