Sleep trouble because of blue light
If you also have trouble sleeping tonight, you should know that the cause could be your… smartphone.
Many of us are not parting with their smartphone during the day and has a habit of reading even in bed before falling asleep. Defer the end of the device to the side and… we can not sleep. The cause may be a blue light emitted by the device display. Today’s LCD screens are designed to emit light as most resembling the sun. In nature, when the sun goes under the horizon, blue light spectrum is turn off. One of the photoreceptor located in the human eye – melanopsin – responds to a narrow range of wavelength of light (between 460 and 480 nm). It is a range of blue light. This receptor has the task of inhibiting the release of melatonin – a hormone secreted by the pineal gland, and is responsible for the regulation of circadian cycles, including sleep and wakefulness. Through this mechanism we do not want to sleep during the day (at least in theory). Monitor screens and mobile devices emit blue light, to get closer to the solar spectrum. Staring at the screen smartphone after dark, for our eyes once again turn on the sun, melatonin production is started, and our brain receives the signal “hey, now it’s morning – get up!”. And not the brightness of the light is the greatest enemy of our eyes and sleep. It’s was blue color of light.
Reading from the smartphone screen at night may postpone the arrival of the deeper stages of sleep even for an hour. Scientists propose a solution: no use of computers, tablets and smartphones for three hours before bedtime. Unacceptable, right? It is solution – after dark use the application to change the color temperature of the colors displayed on the screens of smartphones. Their action is the same, regardless of the application – the color spectrum shift towards the red and elimination of the blue color. In short – the screen will become yellow-orange hue. In the exercise of smartphone do not mind, and can improve sleep quality. For smartphones with Windows and iOS, you can use the application F.lux, and for Android – Twilight.