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The #blue #light of #mobile #phones and #televisions, etc., causes #sleep #problems and #mental #problems, including #depression
blue light
Blue light is one of the types of light in the light #spectrum (400 to 490 nm) that is mostly used in indoor #environments such as televisions, #computers, tablets and mobile phones.
Some studies have shown that exposure to blue light at #night, due to its effect on the body's #biological clock, can reduce #brain activity and have very #damaging effects.
Biological clock
It is an internal clock that exists in our body and is responsible for regulating physical and mental activities, including #sleep, #wakefulness, #concentration and energy needed for daily activities. Our biological clock is sensitive to light that is higher than the blue and #white spectrum.
Because exposure to blue light at night can signal to the brain that it's not time to sleep yet, it makes us stay awake and unable to fall asleep easily. This issue can cause problems in our sleep and mental and physical health.
For this reason, using tools that emit more blue or white light or watching TV, watching videos and playing computer games at night, as factors that can reduce our brain activities, which should be reduced.
Instead, we can use tools such as lamps with warmer #colors and less light (#red or #yellow light, known as warm light).
The #pineal #gland regulates the body's biological clock
A small gland located in the front of the #brain behind and between the eyes
The pineal gland is responsible for controlling sleep and #wakefulness. This gland is activated by the command of the #hypothalamus and it does this by releasing #melatonin.
Using mobile phones at night (especially after 11 pm) can decrease the level of melatonin #hormone in our body. The hormone melatonin is responsible for controlling the sleep and wake cycle of our body.
In addition, blue light can have a direct effect on the nerves and brain. Some studies have shown that exposure to blue light at night can decrease our brain activity, and this may decrease #concentration, increase #fatigue, and increase #feelings of #tension.
In general, using mobile phones at night and exposure to blue light can have negative effects on our sleep and general health. To improve the quality of sleep, it is better to avoid using mobile phones at night or to use methods such as night glasses to reduce exposure to blue light.

Blue light and depression and decreased #motivation
Those who see the blue light of mobile TV and tablets from 11 pm onwards.

They activate a special circuit near the pineal gland, which works to prevent the release of #dopamine. Dopamine is the hormone of motivation and energy. This work gradually reduces motivation and lowers #mood and #energy and leads the brain to depression.
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