Buscar
Mostrando ítems 1-10 de 2729
The influence of spectral power distribution on contrast sensitivity
(SAGE Publications, 2011-07)
The influence of lighting of different spectral power distribution on letter contrast sensitivity has been studied. The different spectral power distributions were obtained by filtering or dimming tungsten halogen lamps. ...
Psychophysical measurements of luminance and chromatic spatial and temporal contrast sensitivity in Duchenne muscular dystrophy
(Pontificia Universidade Católica do Rio de JaneiroUniversidade de BrasíliaUniversidade de São Paulo, 2011)
In children with Duchenne muscular dystrophy, color vision losses have been related to dystrophin deletions downstream of exon 30, which affect a dystrophin isoform, Dp260, present in the retina. To further evaluate visual ...
Sensibilidade ao contraste a grades senoidais de freqüências espaciais baixas em crianças
(PPG em Psicologia, Pontifícia Universidade Católica de Campinas, 2008)
O objetivo deste trabalho foi determinar a função de sensibilidade ao contraste para freqüências espaciais de 0,25; 0,5; 1,0 e 2,0 ciclos por grau em crianças de 4 a 13 anos. Foram estimados limiares de contraste para 60 ...
Light adaptation in letter contrast sensitivity: The influence of optical and neural mechanisms
(Sage Publications, 2013-06)
This work discusses the level of implication of the optical and physiological mechanisms in letter contrast sensitivity (CS) under different conditions of environmental lighting. A study was carried out on 26 eyes with ...
Cone contrast influence on components of the pattern onset/offset VECP
(WILEY-BLACKWELL, 2010)
Transient visual evoked cortical potentials (VECP) were recorded from the scalp of healthy normal trichromats (n = 12). VECPs were elicited by onset/offset presentation of patterned stimuli of two kinds: isochromatic ...
Quantitative and functional influence of surround luminance on the letter contrast sensitivity function
(Wiley Blackwell Publishing, Inc, 2010-03)
Aim: To determine the influence of surround luminance on the letter contrast sensitivity function. Method: The binocular contrast sensitivities of 31 young and ocularly healthy individuals were measured with letters of ...
Determinación de la variabilidad de la sensibilidad al contraste con el FACT en pacientes miopes antes y después de la cirugía refractiva con MULTISCAN, en OPTILASER
(Universidad de La Salle. Ediciones Unisalle, 2004)
Psychophysical Measurements of Luminance Contrast Sensitivity and Color Discrimination with Transparent and Blue-Light Filter Intraocular Lenses
(Springer International Publishing Ag, 2017)
The purpose of this study was to measure luminance contrast sensitivity and color vision thresholdfs in normal subjects using a blue light filter lens and transparent intraocular lens material. Monocular luminance grating ...