Visual Comfort and Acute Alerting Effects of Diurnal Intermittent Bright Light

Diurnal spectral sensitivity of the acute alerting effects of light.

STUDY OBJECTIVES Previous studies have demonstrated short-wavelength sensitivity for the acute alerting response to nocturnal light exposure. We assessed daytime spectral sensitivity in alertness, performance, and waking electroencephalogram (EEG). DESIGN Between-subjects (n = 8 per group). SETTING Inpatient intensive physiologic monitoring unit. PARTICIPANTS Sixteen healthy young adults ...

Alerting effects of light.

Light exerts powerful non-visual effects on a wide range of biological functions and behavior. In humans, light is intuitively linked with an alert or wakeful state. Compared to the effects of light on human circadian rhythms, little attention has been paid to its acute alerting action. Here I summarize studies from the past two decades, which have defined and quantified the dose (illuminance l...

Acute alerting effects of light: A systematic literature review.

Periodic, well timed exposure to light is important for our health and wellbeing. Light, in particular in the blue part of the spectrum, is thought to affect alertness both indirectly, by modifying circadian rhythms, and directly, giving rise to acute effects. We performed a systematic review of empirical studies on direct, acute effects of light on alertness to evaluate the reliability of thes...

Modulation of fluorescent light: flicker rate and light source effects on visual performance and visual comfort

Intermittent Episodes of Bright Light Suppress Myopia in the Chicken More than Continuous Bright Light

PURPOSE Bright light has been shown a powerful inhibitor of myopia development in animal models. We studied which temporal patterns of bright light are the most potent in suppressing deprivation myopia in chickens. METHODS Eight-day-old chickens wore diffusers over one eye to induce deprivation myopia. A reference group (n = 8) was kept under office-like illuminance (500 lux) at a 10:14 light...