Effect of eccentricity and light level on the timing of
light adaptation mechanisms
Posted on 2018-02-23 - 19:42
We explored the complexity of the light adaptation process, assessing adaptation recovery (Ar) at different
eccentricities and light levels.
Luminance thresholds were obtained with transient background fields at mesopic and photopic light levels for
temporal retinal eccentricities (0°-15°) with test/background stimulus size of 0.5°/1° using a staircase procedure
in a two-channel Maxwellian view optical system. Ar was obtained in comparison with steady data (Gloriani et al,
Vision Res., 2016).
Light level affects proportionally Ar only at fovea. Photopic extrafoveal thresholds were one log unit higher for
transient conditions. Adaptation was equally fast at low light levels for different retinal locations with variations
mainly affected by noise. These results evidence different timing in the mechanisms of adaptation involved.
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Barrionuevo, Pablo; Matesanz, Beatriz; Gloriani, Alejandro; de la Fuente, Isabel Arranz; Issolio, Luis; Mar, Santiago; et al. (2018). Effect of eccentricity and light level on the timing of
light adaptation mechanisms. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.3968565.v1
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AUTHORS (7)
PB
Pablo Barrionuevo
BM
Beatriz Matesanz
AG
Alejandro Gloriani
Id
Isabel Arranz de la Fuente
LI
Luis Issolio
SM
Santiago Mar
JA
Juan Aparicio