Person: Bonnin Arias, Cristina Natalia
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First Name
Cristina Natalia
Last Name
Bonnin Arias
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Optometría y Visión
Area
Optica
Identifiers
3 results
Search Results
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Item New Optical Filter Plate for Use as Eye Protection by Welders(Welding journal, 2013) Langa Moraga, Antonio; Bonnin Arias, Cristina Natalia; Chamorro, Eva; Pérez Carrasco, María Jesús; Sánchez Ramos, CeliaPeople whose work tasks involve the use of welding torches are at special risk of suffering eye injuries due to the emission of visible, short-wavelength radiation. Current legislation requires that a company provide its employees with protection against the harmful radiation produced by welding equipment. Often, however, a worker will be reluctant to use protective goggles since these markedly cut visibility and can consequently lead to errors or even burns. This practice of avoiding the use of protection makes them susceptible to suffer irreversible severe retinal damage leading to partial or complete loss of vision. In this paper, we propose the use of a new photoprotective filter in the form of safety goggles that seeks to improve the compromised vision produced by conventional filters. We compare a series of visual function variables in 36 adults, aged 30 to 58 years, using the new optical filter and a conventional filter used for welding protection. Our findings suggest that the filter proposed provides optimal protection against the harmful effects of short-wavelength radiation while minimizing the reduced vision effects of conventional filters used for this purpose.Item Utilidad de la pupilometría dinámica en el control de alcoholemia de los conductores(Adicciones, 2013) Lobato Rincón, Luis-Lucio; Cabanillas Campos, María del Carmen; Navarro Valls, Juan José; Bonnin Arias, Cristina Natalia; Chamorro Gutiérrez, Eva; Sánchez Ramos, CeliaLa pupilometría se ha convertido en una herramienta de gran interés en las Ciencias de la Visión. Hasta el momento, solo unos pocos estudios han explorado la relación entre el reflejo pupilar y el consumo de drogas. El objetivo de este estudio fue evaluar la aplicabilidad de la pupilometría dinámica mesópica como método objetivo para la detección de niveles de alcoholemia por encima del límite legal. Se utilizó un diseño de carácter cuasi-experimental, con 19 voluntarios participando en dos condiciones (pre y post ingesta de alcohol). En la sesión con alcohol, los participantes consumieron 27.5 ml de alcohol en intervalos de 60 minutos durante 4 horas. Se llevaron a cabo registros de pupilometría mediante el Power Refractor II, utilizándose cuatro tipos de estimulación lumínica: blanca (5600 K), azul (450 nm), verde (510 nm) y roja (600 nm). El diámetro basal aumentó significativamente a partir de concentraciones de alcohol en aire espirado iguales o mayores de 0.25 mg/l. Además, el valor de la amplitud de constricción para la luz roja también ofreció diferencias significativas entre las dos condiciones. Estos resultados resultan prometedores en la búsqueda de nuevos métodos de detección de niveles de alcoholemia no permitidos al volante. En este estudio se demuestra que el incremento del diámetro basal y la amplitud pupilar pueden ser utilizados como indicador del nivel de consumo de alcohol. Son necesarios más estudios para validar éste y otros métodos de diagnóstico complementarios a las actuales pruebas de alcoholemia y de consumo de sustancias psicotropas.Item Diffuse Illumination Device to Improve Mesopic Contrast Sensitivity in Drivers.(2013) Navarro Valls, J.J.; Chamorro Gutiérrez, Eva; García Rojo, M.; Langa Moraga, Antonio; Bonnin Arias, Cristina Natalia; Sánchez Ramos, CeliaPurpose: To evaluate the influence of a diffuse illumination device located outside the " eld of vision that provokes a controlled pupillar miosis, on the contrast sensitivity in drivers tested in mesopic conditions. Method: Cross-sectional prospective observational study in which contrast sensitivity by Pelli-Robson Test (CS) was evaluated in 49 drivers under 40 years old and 60 drivers over 40. The study was carried out in a simulated setting for night driving with and without the interposition of the diffuse illumination device. The mesopic contrast sensitivity was measured in the absence or presence of glare. Results: In both age groups, a statistically signi" cant improvement of contrast sensitivity was exhibited. In drivers aged over 40, baseline (BS) Pelli-Robson contrast sensitivity scores were: BS=0.83±0.3 and BSg=0.59±0.3 in absence and in presence of glare, whereas values for the interposition of diffuse illumination device (D) were: D=0.93±0.3 (p<0.05) and Dg=0.62±0.3 (p<0.05). On the other hand, in drivers aged under 40, baseline contrast sensitivity values were: BS=1.09±0.2 and BSg=0.95±0.3 whereas the interposition of the mentioned system showed the following values: D=1.27±0.3 (p<0.05) and Dg=1.11±0.3 (p<0.05). Conclusion: Using a diffuse illumination device in the interior of the vehicle provides significant improvement in contrast sensitivity.