RT info:eu-repo/semantics/article
T1 Influence of age and spectral power distribution on mesopic visual sensitivity
A1 García Vicente, Eduardo
A1 Arranz de la Fuente, Isabel
A1 Issolio, Luis
A1 Martínez Matesanz, Cristina Beatriz
A1 Hernán Gloriani, Alejandro
A1 Menéndez Blanco, Andrés
A1 Rodríguez Rosa, Miguel
A1 Silva, Bárbara
A1 Colombo, Elisa
A1 Mar Sardaña, Santiago
A1 Aparicio Calzada, Juan Antonio
K1 Aging
K1 Envejecimiento
K1 Visual perception
K1 Percepción visual
K1 2209.15 Optometría
AB The ability of the human visual system to detect stimuli at low illumination levels provides awareness of potential risks. Theinfluence of age and spectral power distribution on mesopic spectral sensitivity is analyzed. Two typical light sources are used, ahigh-pressure sodium lamp (HPS), with a higher content of long wavelengths, and a metal halide lamp (MH), with a highercontent of short wavelengths. Two experiments were performed, using a two-channel Maxwellian-view optical system tomeasure contrast threshold under different experimental conditions. In Experiment 1, three age groups (young, middle-agedand 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 thresholdmeasurement was performed with two age groups (young and old, n = 11 each), one retinal location (off-axis vision), onebackground luminance (0.01 cd/m2), and two photometry systems (photopic and the MES2 systems). In on-axis vision, neitherage nor spectral power distribution have an effect on the contrast threshold. In off-axis vision, however, a significant interactionbetween age and spectral power distribution is obtained, albeit only at 0.01 cd/m2 with an MH lamp. Only at this lowestbackground 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 lightinside the aged eye counteracted the benefits of increased rod sensitivity for the MH lamp.
PB Springer Link
SN 1943-393X
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/45125
UL http://uvadoc.uva.es/handle/10324/45125
LA eng
NO Attention, Perception, & Psychophysics, 2019, vol. 81. p. 504-516
NO Producción Científica
DS UVaDOC
RD 23-dic-2024