Blue type of light is responsible for disturbing our sleep cycle and hormonal imbalance, which then leads to depression.
Sleep Disturbance
We have a standard 24-hour cycle known as the circadian rhythm. Circadian rhythm is a cycle that tells our body about daytime and nighttime. Circadian rhythm is maintained by a hormone named melatonin.
At the time of sunrise or dawn time, when sunlight hits our eyes, it gives a signal to suppress melatonin production, which is responsible for sleep. Sunlight has many types of lights. Bluish light in the sunlight is responsible for this specific response.
When night comes, and bluish light is almost zero, it signals the pineal gland to produce melatonin. The normal production of melatonin is responsible for our better sleep.
In this era, we all are using digital devices all the time. Digital devices like computers and smartphones emit blue type of light. When we use our smartphones or computers late in the night, this light suppresses melatonin production, which is our sleep hormone.
Suppression of melatonin is the primary reason behind the disturbance of our sleep cycle. Not getting proper sleep is a great reason for depression. So, in this way, this type of light is contributing to depression.
Signs of clinical depression are.