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
Año del Documento
2019
Editorial
Springer Link
Descripción
Producción Científica
Documento Fuente
Attention, Perception, & Psychophysics, 2019, vol. 81. p. 504-516
Abstract
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
Patrocinador
Ministerio de Economía, Industria y Competitividad (grant FIS2016-78037-P)
Version del Editor
Propietario de los Derechos
© 2019 Springer Link
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
Collections
Files in this item
![Attribution-NonCommercial-NoDerivatives 4.0 Internacional](/themes/Mirage2//images/creativecommons/cc-by-nc-nd.png)