The body's biological clock mechanism follows the rhythm of night and day, and communicates around the clock, which is also known as the daily frequency.

This watch helps to regulate our feeling of sleepiness through its complex mechanisms, which respond to signals sent by the brain region, which in turn monitors the light around us.

Each cell, organ, and tissue in the body depends on the biological clock; therefore, sleep in sufficient time helps to keep it in working condition.

On the other hand, the long exposure to the light from the screens especially in the late hours of the night in many health problems, such as: the incidence of imbalances at the level of cells responsible for regulating the sleep pattern, which in turn causes many diseases, such as insomnia, obesity and cognitive imbalance.

Overall, mobile technology - such as smartphones and tablets - makes us spend more time in front of the screen day and night.

Recent research has shown that light-sensitive eye cells reset the body's biological clock when exposed to light, confirming that prolonged exposure to light during the night can disrupt sleep and harm health.

Scientists have found that circadian rhythm disorders are linked to serious health issues, including metabolic syndrome, insulin intolerance and cancer. Because we use industrial light sources, the natural cycle of sleep and awakening is no longer associated with daytime and nighttime patterns.