Search results for "sensibilidad al contraste"
showing 4 items of 4 documents
Diseño de una nueva prueba para medir la función de sensibilidad al contraste con iPad
2015
[EN] Purpose: To introduce a new application (ClinicCSF) to measure Contrast Sensitivity Function (CSF) with tablet devices, and to compare it against the Functional Acuity Contrast Test (FACT). Methods: A total of 42 subjects were arranged in two groups of 21 individuals. Different versions of the ClinicCSF (.v1 and .v2) were used to measure the CSF of each group with the same iPad and the results were compared with those measured with the FACT. The agreements between ClinicCSF and FACT for spatial frequencies of 3, 6, 12 and 18 cycles per degree (cpd) were represented by Bland---Altman plots. Results: Statistically significant differences in CSF of both groups were found due to the change…
Spatio-temporal Contrast Sensitivity in the Cardinal Directions of the Colour Space. A Review
2010
AbstractWe review the psychophysics of the spatio-temporal contrast sensitivity in the cardinal directions of the colour space and their correlation with those neural characteristics of the visual system that limit the ability to perform contrast detection or pattern-resolution tasks. We focus our attention particularly on the influence of luminance level, spatial extent and spatial location of the stimuli - factors that determine the characteristics of the physiological mechanisms underlying detection. Optical factors do obviously play a role, but we will refer to them only briefly. Contrast sensitivity measurements are often used in clinical practice as a method to detect, at their early …
La eficacia del aprendizaje perceptual como tratamiento de la ambliopía en la infancia, frente a otros tratamientos convencionales
2019
La ambliopía es un trastorno asociado con respuestas anormales del ojo afectado en la corteza visual (Mansouri, Thompson y Hess, 2008) que reduce la agudeza visual (AV) y afecta la percepción espacial de objetos y movimientos. La oclusión, que cubre el ojo dominante, es el tratamiento clásico. El aprendizaje perceptivo ha mostrado resultados positivos, pero se necesitan más estudios a nivel visuo perceptivo, psicomotor y psicoeducativo. Objetivo Analizar el efecto del tratamiento en niños de 4 a 12 años de edad, en términos de AV, estereopsis, sensibilidad de contraste (CS), habilidades visuales-perceptuales, psicomotores y aspectos psicosociales y escolares. Los tratamientos estudiados son…
Material Yincana optométrica. Pruebas
2020
Este documento contiene las instrucciones de la primera yincana optométrica realizada en el Grado de Óptica y Optometría. También están las instrucciones de las 6 pruebas llevadas a cabo y la hoja de resultados del alumnado Los dos ficheros adjuntos contienen el mismo material, pero en las dos lenguas oficiales de la Universitat de València, valenciano y castellano. This document contains the instructions for the first optometric gymkhana performed in Optics and Optometry Degree. There are also the instructions for the 6 tests carried out and the student results sheet.We can find these instructions in valenciano and spanish.