1,720,963 research outputs found
retinal involvement in pigment dispersion syndrome
No full textRetinal involvement has been documented in a number of patients with pigment dispersion syndrome, which also appears to be associated with a higher than normal risk of retinal detachment. We studied 24 patients with this syndrome to determine the prevalence of lattice degeneration and other retinal disorders associated with a predisposition to detachment. Lattice degeneration was found in 8 of 24 patients examined, with a prevalence that is significantly higher than that reported for normal subjects. Four eyes presented areas of retinoschisis and only one displayed a rhegmatogenous detachment. A father and son (both myopes) were found to have similar lattice lesions in the same retinal quadrants. These findings suggest that pigment dispersion syndrome may be associated with developmental anomalies that are not restricted to the anterior chamber but involve other portions of the bulb as well
Lateral canthoplasty by the micro-mitek anchor system: 10 - years review of 96 patients
No full textPurpose: Lateral canthoplasty is useful to correct lower eyelid malposition, restore eyelid function, and protect the ocular surface. An effective method for fixation of soft tissue in the face, such as the lateral canthus, using the Micro-Mitek Anchor System is presented. Patients and Methods: We report our experience in 96 patients who underwent lateral canthoplasty by Micro-Mitek Anchor. One hundred twenty-four lateral canthoplasties were performed, including, senile ectropion, tumors, trauma, cicatricial retraction, and lower eyelid malposition after blepharoplasty. Results: The insertion of a bone anchor requires a limited dissection, and the insertion area can be determined accurately. Using the bone anchor to fixate the lateral canthus to the facial skeleton is an effective way to prevent drooping of the canthus due to gravitational forces. Conclusions: Lateral canthoplasty using the Mitek Anchor System has the advantage of being an easy technique with accurate placement of the anchor, reducing operating tim
Moorfield regression analysis versus retinal nerve fiber layer in glaucoma and ocular hypertension
No full textPurpose: To evaluate the agreement
between Moorfield Regression
Analysis (MRA) and peripapillary
retinal nerve fibers layer thickness.
Methods: 54 eyes with normal VF
and 18 with early VF damage were
classified as ocular hypertension or
early primary open angle glaucoma
(POAG) and were included in the
study: All the subjects performed
achromatic 30° visual field (VF) by
Octopus Program G1X dynamic
strategy and were imaged by HRT 3
and I-Vue OCT. Sectorial and global
MRA and OCT parameters were
used for the analysis. Kappa statistic
was used to assess the agreement
between methods.
Results: A significant agreement
between I-Vue OCT and MRA a
good agreement was shown in the
supero-nasal (κ 0.656) and nasal
(κ 0.627) quadrants followed by the
supero-temporal (κ 0.602) and inferotemporal
(κ 0.586) sectors in all the
eyes studied.
Conclusion: Our results suggest that
the measurements of the ganglion
cells by HRT 3 and I-Vue OCT are not
interchangeable
Valutazione del grado di correlazione tra la MRA (moorfield regression Analysis), il GPS (Glaucoma Probability Score) dell’ HRT III e L’ONH glaucoma analysis dell’OCT i-Vue.
No full text
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
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