Recovery time of the human eye after brief exposures to monochromatic glaring light

Krebs, T.; Gloor, S.; Wüthrich, S.; Lüthy, W.; Weber, H. P.

doi:10.1177/096032719402600404

Cited by 3 publications

(3 citation statements)

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“…Results of all conditions are plotted as a function of the product of luminance and duration of glare light in Figure 3. Results of recovery time of visual acuity are 2 to 7 sec which are within the comparable range of previous study using monochromatic lights [6]. As shown in the figure, recovery time of visual acuity increases as a function of the product of luminance and duration of glare light.…”

Section: Discussionsupporting

confidence: 87%

Effect of Direct Glare of Led Floodlight on Catching a Moving Object

Kamei

Yamada²,

Kohko³

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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To explore the effect of LED floodlight luminance on visual function and visual task relating to glare in foveal vision, two experiments, Exp.1 and Exp.2, were carried out. In Exp.1, recovery time of visual acuity, afterimage duration, and subjective degree of discomfort glare were measured for 4 levels of glare light luminance with 0.2 and 0.5 sec durations. All results increased with the increase of glare light luminance. In Exp.2, target capture ability was measured for 7 levels of glare light luminance with 2 levels of background simulating outdoor and indoor stadiums. Absolute time difference of observer's response from the perfect catch is employed as an index of catching performance. It is indicated that glare of LED flood light begins to affect the catching performance around at 3 x 10 5 cd/m 2 , and gives serious effect over 9 x 10 5 cd/m 2 .

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Section: Discussionsupporting

confidence: 87%

Effect of Direct Glare of Led Floodlight on Catching a Moving Object

Kamei

Yamada²,

Kohko³

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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“…- 2 The head of the subject is stabilised in the head rest. The subject looks at the Landolt ring with the right eye and presses a button with the right hand to cause the glare source to shine.…”

Section: Methodsmentioning

confidence: 99%

“…His experiments proved that the afterimage had the same effect in reducing contrast as did the veiling luminance. Krebs et al (2,3) and Gloor et al (4) measured the length of time it took for an illuminated test pattern to become visible after exposure of the eye to a glare source for a variety of different wavelengths, luminances and display positions and for different exposure times.…”

Section: Introductionmentioning

confidence: 99%

Recovery time of visual acuity after exposure to a glare source

Irikura

Toyofuku

Aoki³

1999

Lighting Research and Technology

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The time taken for the recovery of visual acuity after exposure to a glare source with a duration of 1.6 s or less, was determined by visual experiments. Background luminance was set to 0.10 cd m -2 , 0.32 cd m -2 or 1.0 cd m -2 . The recovery time increases as the exposure time increases. At every luminance of the glare source, recovery time clearly grows shorter as the background luminance increases. The recovery time is determined by the product of the luminance of the glare source and the exposure time.

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Simulating Visual Contrast Reduction during Nighttime Glare Situations on Conventional Displays

Meyer

Grogorick

Vollrath

et al. 2016

ACM Trans. Appl. Percept.

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Bright glare in nighttime situations strongly decreases human contrast perception. Nighttime simulations therefore require a way to realistically depict contrast perception of the user. Due to the limited luminance of popular as well as specialized high-dynamic range displays, physical adaptation of the human eye cannot yet be replicated in a physically correct manner in a simulation environment. To overcome this limitation, we propose a method to emulate the adaptation in nighttime glare situations using a perception-based model. We implemented a postprocessing tone mapping algorithm that simulates the corresponding contrast reduction effect for a night-driving simulation with glares from oncoming vehicles headlights. During glare, tone mapping reduces image contrast in accordance with the incident veiling luminance. As the glare expires, the contrast starts to normalize smoothly over time. The conversion of glare parameters and elapsed time into image contrast during the readaptation phase is based on extensive user studies carried out first in a controlled laboratory setup. Additional user studies have then been conducted in field tests to ensure validity of the derived time-dependent tone-mapping function and to verify transferability onto real-world traffic scenarios.

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Recovery time of the human eye after brief exposures to monochromatic glaring light

Cited by 3 publications

References 0 publications

Effect of Direct Glare of Led Floodlight on Catching a Moving Object

Effect of Direct Glare of Led Floodlight on Catching a Moving Object

Recovery time of visual acuity after exposure to a glare source

Simulating Visual Contrast Reduction during Nighttime Glare Situations on Conventional Displays

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