Background: It has been shown that short-wavelength blue component of the visible light
spectrum can alter the circadian rhythm and suppress the level of melatonin hormone. The …

The exposure of humans to artificial light at night (ALAN) with predominant blue part of the
visible spectrum is strongly influencing circadian rhythm and sleep through melanopsin …

Smartphones deliver light to users through Light Emitting Diode (LED) displays. Blue light is
the most potent wavelength for sleep and mood. This study investigated the immediate …

About a third of adults have sleep problems, while in the student population this number is
much higher due to a specific lifestyle. It has been shown that the use of devices with light …

There are studies reporting the negative impact of smartphone utilization on sleep. It is
considered that reduction of melatonin secretion under the blue light exposure from smart …

Smartphone usage strongly increased in the last decade, especially before bedtime. There
is growing evidence that short-wavelength light affects hormonal secretion …

Blue light, with wavelengths shorter than 440–450 nm, is the most energetic radiation of the
visible spectrum for the human eye, and its possible multiple effects on the human nervous …

PURPOSE The purpose of this study was to compare the radiation produced by
smartphones that reaches the eye when using night-mode functions or blue-light–reducing …

Background The use of electronic devices emitting blue light during evening hours has been
associated with sleep disturbances in humans, possibly due to the blue light-mediated …

Introduction. The use of blue light‐emitting devices (smartphones, tablets, and laptops) at
bedtime has negative effects on sleep due to light stimulation and/or problematic excessive …