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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/45125

    Título
    Influence of age and spectral power distribution on mesopic visual sensitivity
    Autor
    García Vicente, EduardoAutoridad UVA
    Arranz de la Fuente, IsabelAutoridad UVA Orcid
    Issolio, Luis
    Martínez Matesanz, Cristina BeatrizAutoridad UVA Orcid
    Gloriani, Alejandro HernanAutoridad UVA
    Menéndez Blanco, Andrés
    Rodríguez Rosa, Miguel
    Silva, Bárbara
    Colombo, Elisa
    Mar Sardaña, SantiagoAutoridad UVA Orcid
    Aparicio Calzada, Juan AntonioAutoridad UVA Orcid
    Año del Documento
    2019
    Editorial
    Springer Link
    Descripción
    Producción Científica
    Documento Fuente
    Attention, Perception, & Psychophysics, 2019, vol. 81. p. 504-516
    Zusammenfassung
    The ability of the human visual system to detect stimuli at low illumination levels provides awareness of potential risks. The influence of age and spectral power distribution on mesopic spectral sensitivity is analyzed. Two typical light sources are used, a high-pressure sodium lamp (HPS), with a higher content of long wavelengths, and a metal halide lamp (MH), with a higher content of short wavelengths. Two experiments were performed, using a two-channel Maxwellian-view optical system to measure contrast threshold under different experimental conditions. In Experiment 1, three age groups (young, middle-aged and old, n = 2 each), two retinal locations (on-axis and off-axis vision), four background luminances (0.01, 0.07, 0.45, and 3.2 cd/ m2 ), and two photometry systems (photopic and the MES2 systems) were considered. In Experiment 2, contrast threshold measurement was performed with two age groups (young and old, n = 11 each), one retinal location (off-axis vision), one background luminance (0.01 cd/m2 ), and two photometry systems (photopic and the MES2 systems). In on-axis vision, neither age nor spectral power distribution have an effect on the contrast threshold. In off-axis vision, however, a significant interaction between age and spectral power distribution is obtained, albeit only at 0.01 cd/m2 with an MH lamp. Only at this lowest background luminance was the greater content of short wavelengths of this lamp responsible for higher rod stimulation in offaxis vision, with the subsequent improvement in detection performance in young subjects. However, the effect of diffused light inside the aged eye counteracted the benefits of increased rod sensitivity for the MH lamp.
    Materias Unesco
    2209.15 Optometría
    Palabras Clave
    Aging
    Envejecimiento
    Visual perception
    Percepción visual
    ISSN
    1943-393X
    Revisión por pares
    SI
    DOI
    10.3758/s13414-018-1616-6
    Patrocinador
    Ministerio de Economía, Industria y Competitividad (grant FIS2016-78037-P)
    Version del Editor
    https://link.springer.com/article/10.3758%2Fs13414-018-1616-6
    Propietario de los Derechos
    © 2019 Springer Link
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/45125
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • TOD - Artículos de RevistaTOD - Artículos de Revista [13]
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    Dateien zu dieser Ressource
    Nombre:
    Influence-of-age-and-spectral.pdf
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    Universidad de Valladolid

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