Investigating causal effects of pupil size on visual discrimination and visually evoked potentials in an optotype discrimination task.

ABSTRACT: Pupil size primarily changes to regulate the amount of light entering the retina, optimizing the balance between visual acuity and sensitivity for effective visual processing. However, research directly examining the relationship between pupil size and visual processing has been limited. While a few studies have recorded pupil size and EEG signals to investigate the role of pupil size in visual processing, these studies have predominantly focused on the domain of visual sensitivity. Causal effects of pupil size on visual acuity, therefore, remain poorly understood. By manipulating peripheral background luminance levels and target stimulus contrast while simultaneously recording pupillometry and EEG signals, we examined how absolute pupil size affects visual discrimination and visually evok

SUBMITTER: Chin HH 

PROVIDER: S-EPMC11473405 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature