Stereoscopy in Descriptive Geometry books

[EN] This article summarizes the research carried out by collecting the books, related to Descriptive Geometry, that have employed stereoscopy as a way to improve the knowledge of the represented forms. It has been possible to collect 19 books, published between 1912 and 2007, which have been analyzed and compared. Many of them have been acquired through international dealers, as they are a rarity. The article focuses on the oldest and most interesting ones, highlighting their most relevant aspects. To display the stereoscopic figures conveniently, It has been necessary to carry out a thorough process of digital optimization, in order to adapt the colors of inks to a single visualization system with conventional red/cyan glasses. Finally, the results of the full analysis will be shown.[ES] Este artículo sintetiza la investigación llevada a cabo a partir de la recopilación de los libros relacionados con la Geometría Descriptiva, que han utilizado la estereoscopia para ampliar el conocimiento de las formas geométricas representadas. Se han podido recopilar 19 obras, publicadas entre 1912 y 2007, que han sido analizadas y comparadas. Muchas de ellas han tenido que ser adquiridas a través de anticuarios internacionales, pues constituyen toda una rareza. Aquí se muestran las más antiguas e interesantes, destacando los aspectos más relevantes de cada una de ellas. Para mostrar convenientemente sus figuras estereoscópicas, ha sido necesario realizar un profundo trabajo de edición digital, con el fin de uniformizar las tintas, adaptándolas a un único sistema de visualización con gafas convencionales de filtros rojo/cian. Finalmente se muestran los resultados del análisis completo con todos los libros encontradosCabezos Bernal, PM.; Cisneros Vivó, JJ. (2015). La estereoscopia en los libros de geometría descriptiva. EGA. Revista de Expresión Gráfica Arquitectónica. 20(26):242-255. doi:10.4995/ega.2015.4058.SWORD242255202

Chromatic-achromatic perimetry in four clinic cases: Glaucoma and diabetes

Background: Some diseases that affect the visual system may show loss of chromatic-achromatic sensitivity before obvious physical signs appear in the usual examination of the eye's posterior segment. A perimetric study has been conducted with four typical patients with glaucoma and diabetes, at different stages of the disease. Materials and Methods: In addition to the standard white-on-white (standard automated perimetry [SAP]), a test battery has been used to study patient's contrast sensitivity, using stimuli with different chromatic, spatial, and temporal content (multichannel perimetry). The choice of stimuli tries to maximize the response of different visual mechanisms: Achromatic (parvocellular and magnocellular origin); chromatic red-green (parvocellular origin); and chromatic blue-yellow (koniocellular origin). Results: The results seem to indicate losses in the achromatic-parvocellular perimetry and both chromatic perimetry tests, undetected by conventional SAP. Conclusions: Our results illustrate that our patients without visible retinal alterations show signs of suspicion in multichannel perimetry.The ATD multichannel perimeter was built thanks to the support of the Spanish Ministery for Science and Technology Grants DPI2000-0116-P4-02 and PTR 1995-0909-OP, in collaboration with INDUSTRIAS DE OPTICA SA (San Cugat del Vallés, Spain)

Intrasession repeatability of refractive and ocular aberrometric measurements obtained using a multidiagnostic device in healthy eyes

Purpose: To evaluate the intrasession repeatability of refractive and ocular aberrometric measurements obtained using a new multidiagnostic device in healthy eyes. Patients and methods: A total of 107 eyes of 107 patients, age ranging from 23 to 65 years, were enrolled in this study. A complete eye examination was performed in all eyes, including an ocular examination using the VX120 system. Three consecutive measurements were obtained using this device to assess the intrasession repeatability of different refractive and ocular aberrometric parameters. The within-subject standard deviation (Sw), intrasubject precision (1.96×Sw), and intraclass correlation coefficient (ICC) were calculated. Results: Sw and intrasubject precision for refractive data were below 0.12 and 0.20 D, respectively, in all cases. The ICC ranged from 0.947 for the J45 power vector component to 0.997 for the sphere. Concerning aberrometric measurements Sw and intrasubject precision values were below 0.05 µm and 0.10 µm, respectively. Likewise, the ICC ranged from 0.805 for the quadrafoil root mean square to 0.954 for the primary spherical aberration. Poor correlations were found between most of the refractive parameters and their Sw (–0.033≤r≤0.053, p≥0.064). Moderate and significant positive correlations were found between the magnitude of the aberrometric parameters evaluated and their Sw (r≥0.446, p<0.001). Conclusion: The new multidiagnostic device evaluated is able to provide consistent measurements of refraction and ocular aberrations in healthy eyes. Future studies should confirm if this consistency is also observed in highly aberrated eyes

Corneal Topographic and Aberrometric Measurements Obtained with a Multidiagnostic Device in Healthy Eyes: Intrasession Repeatability

Purpose. To evaluate the intrasession repeatability of corneal curvature, eccentricity, and aberrometric measurements obtained with a multidiagnostic device in healthy eyes. Methods. This study enrolled 107 eyes of 107 patients ranging in age from 23 to 65 years. All of them underwent a complete anterior segment examination with the VX120 system (Visionix-Luneau Technologies, Chartres, France). Three consecutive measurements were obtained. The within-subject standard deviation (Sw), intrasubject precision (1.96xSw), and intraclass correlation coefficient (ICC) were calculated. Results. All Sw for corneal power measurements were below 0.26 D, with ICC above 0.982. The Sw for corneal astigmatism at different areas (3, 5, and 7 mm) was below 0.21 D, with ICC above 0.913. Concerning the axis of astigmatism, its Sw was below 11.27°, with ICC above 0.975. The Sw and ICC for corneal eccentricity were 0.067 and 0.957, respectively. The Sw and ICC for high-order aberration root mean square (RMS) were 0.048 µm and 0.901, respectively. For 3rd- and 4th-order aberrometric parameters, all Sw were below 0.037 µm and all ICC were higher than 0.84, except for quadrafoil RMS (ICC: 0.689). Conclusions. The multidiagnostic device evaluated is able to provide consistent measurements of corneal power, eccentricity, and third- and fourth-order aberrations in healthy eyes

Intrasession repeatability of ocular anatomical measurements obtained with a multidiagnostic device in healthy eyes

Background: To evaluate the intrasession repeatability of anterior chamber depth (ACD), central (CCT) and peripheral corneal thickness (PCT), white-to-white diameter (WTW), and irido-corneal angle (IA) measurements obtained with a multidiagnostic device in healthy eyes. Methods: A total of 107 eyes of 107 patients ranging in age from 23 to 65 years were examined with the VX120 system (Visionix-Luneau Technologies). Three consecutive measurements were obtained with this device to assess the intrasession repeatability of ACD, CCT, PCT at different nasal and temporal locations, WTW, and nasal and temporal IA. Data analysis included the calculation of within-subject standard deviation (Sw), intrasubject precision (1.96xSw), coefficient of variation (CV) and intraclass correlation coefficient (ICC). Results: The Sw and CV for ACD was 0.03 mm and 1.16%, respectively, with an ICC of 0.992. The Sw values for central and peripheral pachymetric measurements were below 9 μm, with CV of less than 1.6% and ICC of 0.976 or higher. For IA measurements, Sw values of 0.84 or lower were found, with a CV between 1 and 2%, and an ICC of more than 0.970. The Sw for WTW was 0.24 mm and the CV was 1.95%. No statistically significant correlations were found between any anatomical parameter evaluated and their Sw and CV values associated (−0.220 ≤ r ≤ 0.204, p ≥ 0.125). Conclusions: The VX120 system is able to provide repeatable measurements of anatomical parameters in healthy eyes. Inter-observer repeatability should be evaluated in future studies

Imported malaria in a cosmopolitan European city: A mirror image of the world epidemiological situation

© 2008 Millet et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens

Puesta en marcha y coordinación del Máster en Optometría Avanzada y Salud Visual

Durante el curso 2015-2016 se va a implantar, en la Universidad de Alicante, el máster en Optometría Avanzada y Salud Visual, que fue aprobado por la ANECA en diciembre del 2014. Con el fin de coordinar las actividades docentes de cada una de las asignaturas del máster y dentro del Proyecto de Redes de Investigación en Docencia Universitaria 2014-2015, se ha creado una red formada por todos los profesores coordinadores de las asignaturas que constituyen el plan de estudios y que han participado en la realización de la memoria de dicho máster. En esta red se pretende la coordinación entre todas las asignaturas para organizar y desarrollar sus actividades con el fin de conseguir una buena distribución de la carga docente y un mejor aprovechamiento por parte del alumno de la docencia recibida. Por otra parte, dado que en este máster participan varias empresas del sector óptico y clínicas oftalmológicas es necesario determinar qué actividades propuestas por las empresas y clínicas se van a incluir en cada asignatura y planificarlas adecuadamente

Imported malaria among African immigrants: is there still a relationship between developed countries and their ex-colonies?

© 2009 Millet et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens

Trabajo de coordinación para la implantación del Máster en Optometría Avanzada y Salud Visual

Durante el curso 2013-2014 la Universidad de Alicante ha propuesto la implantación del Master en Optometría Avanzada y Salud Visual, dicha solicitud está siendo actualmente evaluada por la ANECA. Con el fin de coordinar la docencia de este Máster y dentro del Proyecto de Redes de Investigación en Docencia Universitaria 2013-2014, se ha creado una red formada por todos los profesores que han participado en la elaboración del plan de estudios. En esta red esta red se pretende la coordinación entre las distintas asignaturas para elaborar las guías docentes a partir de los datos de las fichas enviadas a la ANECA. Por otra parte también se ha modificado la memoria atendiendo a las alegaciones realizadas por la ANECA. Y se han desarrollado los contenidos, la metodología de las distintas actividades propuestas con el fin de asegurar la consecución de las competencias previstas

Comparative study of paediatric prescription drug utilization between the spanish and immigrant population

<p>Abstract</p> <p>Background</p> <p>The immigrant population has increased greatly in Spain in recent years to the point where immigrants made up 12% of the infant population in 2008. There is little information available on the profile of this group with regard to prescription drug utilization in universal public health care systems such as that operating in Spain. This work studies the overall and specific differences in prescription drug utilization between the immigrant and Spanish population.</p> <p>Methods</p> <p>Use was made of the Aragonese Health Service databases for 2006. The studied population comprises 159,908 children aged 0-14 years, 13.6% of whom are foreign nationals. Different utilization variables were calculated for each group. Prescription-drug consumption is measured in Defined Daily Doses (DDD) and DDD/1000 persons/day/(DID).</p> <p>Results</p> <p>A total of 833,223 prescriptions were studied. Utilization is lower for immigrant children than in Spanish children for both DID (66.27 v. 113.67) and average annual expense (€21.55 v. €41.14). Immigrant children consume fewer prescription drugs than Spanish children in all of the therapy groups, with the most prescribed (in DID) being: respiratory system, anti-infectives for systemic use, nervous system, sensory organs. Significant differences were observed in relation to the type of drugs and the geographical background of immigrants.</p> <p>Conclusion</p> <p>Prescription drug utilization is much greater in Spanish children than in immigrant children, particularly with reference to bronchodilators (montelukast and terbutaline) and attention-disorder hyperactivity drugs such as methylphenidate. There are important differences regarding drug type and depending on immigrants' geographical backgrounds that suggest there are social, cultural and access factors underlying these disparities.</p