Producción CyT
ICO-23 enlightening the future - Research lines of the Illumination and Vision Group of the University of Valladolid, Spain
Congreso
Autoría:
Aparicio, Juan A. ; Gloriani, Alejandro ; Arranz, Isabel ; Matesanz, Beatriz M. ; de las Heras, Soraya ; de Leon, Judith ; Menendez, Jose ; Galindo, Alicia ; Issolio, Luis A. ; BARRIONUEVO, PABLO ALEJANDRO ; Mar, SantiagoFecha:
2014Editorial y Lugar de Edición:
Spanish Optical Society (SEDOPTICA)Resumen *
The Illumination and Vision Group of the University of Valladolid has developed several research lines in the field of vision for the last 10 years. The most significant results come from the analysis of the visual sensitivity of the human system under different spatial and temporal conditions of the adaptation field, luminance and type of illuminant. Two different ways of facing the problem have been addressed: a) The measurement of letter contrast sensitivity under very different environmental lighting conditions. Our goal was to answer the following questions: 1) how the optical and neurological aspects can influence the contrast sensitivity changes when lighting conditions change?, 2) Does the color temperature of the illuminant produce any significant effect on the visibility of small low-contrast letters?, 3) Is it possible to normalize the lighting conditions of the contrast sensitivity test in the clinical offices in order to achieve invariant results under very different lighting situations? b) The measurement of the light detection thresholds of the different parts of the human retina under illumination conditions which range from the mesopic to the photopic ranges (0.05 cd/m2-120 cd/m2). Basic, clinical and technological questions are being faced: 1) How the photoreceptor control gain changes with luminance, eccentricity and field size?, 2) how speed of adaptation changes with eccentricity in the high mesopic range (night driving conditions)?, 3) does the small-field adaptation campimetry is useful to assess the retinal functionality of visually impaired people such as the retititis pigmentosa patients?, 4) which is the behavior of the visual system under the light sources employed in night driving or street lighting at night? A summary will be presented here and most of the published results and other not published yet will be shown at the conference. Información suministrada por el agente en SIGEVAPalabras Clave
ADAPTATION MECHANISMSDETECTION THRESHOLDCONTRAST SENSITIVITYPSYCHOPHYSICS