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Pupillary response to glare illusions of different colors

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Geekz Snow
Pupillary response to glare illusions of different colors

The pupil expands (dilates) in dark environments and contracts in bright environments in order to control the amount of light that enters the eye.

This study involved showing glare illusions to subjects in a variety of different colors, and concluded that a blue glare illusion was perceived to be the brightest among all the colors and that subjects' pupils constricted significantly in relation to this perception.

The results of this study were published in the Dutch journal, Acta Psychologica on July 6.

The research team hypothesized that the blue glare illusion would be perceived as the brightest because the color blue is most associated with the sky and sunlight typically appears to have a gradient of luminance.

In other words, the team surmised that the human visual system often relies on ecologically-based predictions to interpret visual input.

This effect is thought to be unique to glare illusions, as it was not observed for visual stimuli without any illusory glare effects.

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Geekz Snow
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