title: Retinal mesopic adaptation model for brightness perception under transient glare.
abstract: A glare source in the visual field modifies the brightness of a test patch surrounded by a mesopic background. In this study, we investigated the effect of two levels of transient glare on brightness perception for several combinations of mesopic reference test luminances (Lts) and background luminances (Lbs). While brightness perception was affected by Lb, there were no appreciable effects for changes in the Lt. The highest brightness reduction was found for Lbs in the low mesopic range. Considering the main proposal that brightness can be inferred from contrast and the Lb sets the mesopic luminance adaptation, we hypothesized that contrast gain and retinal adaptation mechanisms would act when a transient glare source was present in the visual field. A physiology-based model that adequately fitted the present and previous results was developed.
authors: Pablo Alejandro
authors: PA
authors: Barrionuevo
authors: Elisa Margarita
authors: EM
authors: Colombo
authors: Luis Alberto
authors: LA
authors: Issolio
mesh_terms: D000328:Adult; D003198:Computer Simulation; D004867:Equipment Design; D005584:Fovea Centralis / Q000502:physiology; D006801:Humans; D008027:Light; D008959:Models, Neurological; D008962:Models, Theoretical; D010775:Photic Stimulation / Q000379:methods; D011594:Psychometrics; D011597:Psychomotor Performance / Q000502:physiology*; D012160:Retina / Q000502:physiology; D012684:Sensory Thresholds / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology*; D014796:Visual Perception