Do you have problem falling asleep ? Are you using your smartphone or tablet late evening or late night does your eyes feel tired reading on the phone ? " Eyeprotect - blue light filter " may be a solution for you!

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


While light of any kind can suppress the secretion of melatonin blue light at nights does so more powerfully.

The bluelight suppressed melatonin for about twice as long as the green light and shifted the rhythm by twice as much (3 hours. vs. 1.5 hour).

What you can do ?

- Use dim redlights at darkness. Redlight has the least power to suppress melatonin.

- Avoid looking at bright screens beginning two to three hours before bed.

- Expose yourself to lots of bright light during the day which will boost your ability to sleep at night as well as your mood and alertness during daylight.

- If you work a night shift or use a lot of electronic devices consider wearing blue-blocking glasses or installing our app that filters the flux of blue light emitted by your phone or tablet and protects your eyes with a soft and pleasant red filter.


Examples of associated scientific research:

Everyone has slightly different circadian rhythm but the average length is 24 and one-quarter hours.

The circadian rhythm of people who stay up late is slightly longer while the rhythms of earlier birds fall short of 24 hours.

Harvard Medical School showed in 1981 that daylight keeps a person's internal clock aligned with the environment.

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

light in 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 lights pulses can delay the phase of the circadian of earthborns. 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 spotlight of circadian rhythms the pupil and the visual perception under devoid of 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

Sensitivity of the human circadian pacemaker night light: Resetting and suppression of melatonin stage. 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 expose to it. JF Duffy RE Kronauer CA Czeisler 1996

Expose yourself to lights and darkness can treat poor physiological adaptation to night work. Johnson MP Duffy JF Brown IN Ronda JM charles Kronauer RE. 1990

You can look for morstudies online there is some keywords to help you: Circadian Melatonin Melanopsin Light Wavelength etc ...