2024-03-28T15:54:51Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/451252023-04-21T08:02:03Zcom_10324_44580com_10324_954com_10324_894col_10324_44581
Influence of age and spectral power distribution on mesopic visual sensitivity
García Vicente, Eduardo
Arranz de la Fuente, Isabel
Issolio, Luis
Martínez Matesanz, Cristina Beatriz
Hernán Gloriani, Alejandro
Menéndez Blanco, Andrés
Rodríguez Rosa, Miguel
Silva, Bárbara
Colombo, Elisa
Mar Sardaña, Santiago
Aparicio Calzada, Juan Antonio
Producción Científica
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.
2021-01-25T08:51:13Z
2021-01-25T08:51:13Z
2019
info:eu-repo/semantics/article
Attention, Perception, & Psychophysics, 2019, vol. 81. p. 504-516
1943-393X
http://uvadoc.uva.es/handle/10324/45125
10.3758/s13414-018-1616-6
eng
https://link.springer.com/article/10.3758%2Fs13414-018-1616-6
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2019 Springer Link
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