Everyone

Petr Nálevka (Urbandroid)

Ice Cream Sandwich

Thank you to you for downloading and using our app: Twilight ! Translation French by Jeremy Del Grosso (Genetik57)

Do you have trouble falling asleep ? Are you a hyperactive child who plays on their smartphone or tablet before going to bed? Do you use your smartphone or tablet late evening? Twilight may be a solution for you!

Recent research suggests that exposure to blue light before sleep can distort your natural (circadian) This rhythm and cause an inability to fall asleep .

The cause is the photoreceptor in your eyes, called Melanopsin . This receptor is sensitive to a narrow band of blue light between 460nm-480nm, this range can suppress the production of melatonin - a hormone responsible for your healthy sleep-wake cycles.

In scientific experimental studies, it was shown for the average person that reading on a smartphone or tablet two hours before sleep can make it shorter by about an hour.

The application Twilight fit the screen of your device at the time of the day. It filters the blue spectrum on your smartphone or tablet after sunset and protect your eyes with a mild and pleasant red filter . The filter and the intensity is adjusted smoothly to the solar cycle based on sunset and sunrise from your local time .

Examples of associated scientific research:

Amplitude reduction and phase shifts melatonin, cortisol and other circadian rhythms after a gradual advance of sleep and light exposure in humans. Derk-Jan Dijk, Jeanne F. Duffy, Edward J. Silva, Theresa L. Shanahan, Diane B. Boivin, Charles A. Czeisler 2012

Exposure to the light in your room before bedtime suppresses the onset of melatonin and shortens the duration of melatonin in humans. Joshua J. Gooley, Kyle Chamberlain, Kurt A. Smith, Sat Bir S. Khalsa, Shantha MW Rajaratnam, Eliza Van Reen, Jamie M. Zeitzer, Charles A. Czeisler, Steven W. 2011

Effect of light on the circadian physiology of man. Jeanne F. Duffy, Charles A. Czeisler 2009

The effectiveness of a single sequence of intermittent light pulses can delay the phase of the circadian rhythm of humans. Claude Gronfier, Kenneth P. Wright, Richard E. Kronauer, Megan E. Jewett, Charles A. Czeisler 2009

The intrinsic period and light intensity determine the phase relationship between melatonin and sleeping man. Kenneth P. Wright, Claude Gronfier Jeanne F. Duffy, Charles A. Czeisler 2009

The impact of the timing of sleep and exposure to bright light can cause attention deficit during night work. Nayantara Santhi, Daniel Aeschbach, Todd S. Horowitz, Charles A. Czeisler 2008

The sensitivity to short wavelength light of the circadian rhythms, the pupil and the visual perception under devoid of the outer retina in humans. Farhan H. Zaidi, Joseph T. Hull, Stuart N. Peirson, Katharina Wulff, Daniel Aeschbach, Joshua J. Gooley, George C. Brainard, Kevin Gregory-Evans, Joseph F. Rizzo III, Charles A. Czeisler, Russell G . Foster, Merrick J. Moseley, Steven W. Lockley. 2007

High sensitivity of the human circadian rhythm of melatonin to reset by light of short wavelength. Lockley SW, Brainard GC, Czeisler CA. 2003

Sensitivity of the human circadian pacemaker night light: Resetting and suppression of melatonin phase. Jamie M Zeitzer, Derk-Jan Dijk, Richard E Kronauer, N Emery Brown, Charles A Czeisler 2000

Human circadian rhythms changing phase influence on sleep time, on your social contact and a slight exposure to it. JF Duffy, RE Kronauer, CA Czeisler 1996

Exposure to light and darkness can treat poor physiological adaptation to night work. Czeisler CA, Johnson MP, Duffy JF, Brown IN, Ronda JM, Kronauer RE. 1990


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