1,720,998 research outputs found
LASIK and PRK in refractive accommodative esotropia : a retrospective study on 20 adolescent and adult patients
No full textPURPOSE: To evaluate the clinical results obtained with excimer laser treatment of fully refractive accommodative esotropia. METHODS: Fully refractive accommodative esotropia was corrected in 17 patients with laser in situ keratomileusis (LASIK) and in 3 patients with photorefractive keratectomy (PRK). The mean age of the patients at time of refractive surgery was 18.8 years (range 14 to 24 years). All surgical procedures were performed under local anesthesia. The preoperative and postoperative data were retrospectively analyzed with regards to visual acuity, ocular alignment, and stereopsis. RESULTS: The mean preoperative deviation without correction was 18.1Delta for near vision and 13.7Delta for distance vision. After refractive surgery the mean postoperative deviation was 4Delta esophoria at near, and 2.5Delta of esophoria at distance: 10 patients (50%) showed esophoria for both distance and near vision, 2 patients (10%) esophoria only for near vision, and 8 patients (40%) orthophoria for both distance and near vision. Emmetropia (-/+1.00 D) was obtained in 97.5% of eyes (39 of 40). The mean correction obtained with excimer laser was +4.62 D(range +2.25 to +7.75, SD 4.52). The preoperative BSCVA was in all eyes greater than or equal to 20/30. There were no significant differences observed between the preoperative and postoperative mean best-corrected visual acuity (p=0.32). There were no complications. The follow-up period lasted a mean of 30.2 months. CONCLUSIONS: The treatment of fully refractive accommodative esotropia with excimer laser was found effective and safe, even in young or adolescent patients. More studies are needed to increase the patient experience and extend the follow-up period in order to evaluate the stability of these results over tim
Photorefractive keratectomy for myopic anisometropia : a retrospective study on 18 children
No full textPURPOSE: To evaluate the safety and efficacy of photorefractive keratectomy (PRK) performed under topical anesthesia in children with myopic anisometropia. METHODS: Medium to high unilateral myopia was corrected in 18 patients by PRK. At the time of surgery patients were between 7 and 17 years of age (mean 10 years). All the surgical procedures were performed under topical anesthesia. Pre- and postoperative data regarding visual acuity, eye alignment, and binocular vision were analyzed. RESULTS: The mean correction (SE) obtained with excimer laser was -8.21 D (range: -2.25 to -14.50, SD 3.90). The mean preoperative best spectacle-corrected visual acuity (BSCVA) was 20/70, and the postoperative mean BSCVA was 20/50. A significant difference was observed between the arithmetic mean of the preoperative and postoperative BSCVA (p=0.001). Two of 18 patients improved stereopsis; furthermore, surgery variation strabismus was registered in 33.3% of the patients, following PRK. Patients were followed up for a mean of 39 months. CONCLUSIONS: The treatment of medium to high unilateral myopia with PRK under local anesthesia was found effective and safe in pediatric and adolescent patients. This procedure may improve ocular alignment and stereopsis. Further studies are needed to increase the patient experience and extend follow-up time in order to assess the long-term stability of the RESULTS
Immersioni quotidiane : Vita ordinaria, cultura visuale e nuovi media
No full textIl volume esplora elementi della vita ordinaria contemporanea divenuti ai nostri occhi insieme problematici e sorprendenti – identità, corpi, sensi, luoghi, oggetti, immagini – giacché trasformati senza sosta dalle innovazioni della cultura tecno-estetica e visuale
dei nuovi media e dalle applicazioni della realtà virtuale e aumentata al mondo in cui siamo immersi.
Approfondendo le tante piccole esperienze e pratiche creative, ma anche critiche, oggi possibili nel nostro quotidiano ipermediato, i curatori del volume privilegiano prospettive e strumenti di lettura apertamente inter-, multi- e trans-disciplinari: dall’estetica all’Everyday Aesthetics, dalle teorie all’archeologia dei media, dai Film ai Game Studies
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
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