In earlier blogs, we talked about Source and effects of blue light on our daily life. We also shared tips for safer screen viewing. Today, we will discuss the relation between sleep and Blue light & how it affects the circadian rhythm.
We all know that the use of Digital devices during sleeping hours is a topic of fierce debate in recent time. There are thousands of articles written on the subject and we all are fairly concerned on the topic.
As discussed earlier, this high-energy light of shorter wavelength is essential for cognitive functions like memory, regulating emotions, and increasing alertness in an individual. On the other hand, overexposure to blue light has the ability to disrupt sleep by decreasing the release of melatonin and increasing alertness.
Let us see more negative and positive effects of Blue Light on different bodily functions including sleep.
NEGATIVE EFFECTS OF BLUE LIGHT ON BODILY FUNCTIONS
According to a research by a renowned neurologist from Harvard University, Exposure to Blue-Light in the early evening results in the delay in the circadian cycle. Which resets the body clock to a later schedule. On the other hand, exposure to the same in the early morning results in circadian advancement and it resets the clock to an earlier schedule.
According to a study by Endocrine Society, night time exposure to Blue Light reduces the level of melatonin by around 85 percent. Thus increasing alertness during sleep.
The effect of Blue-light on sleep quality is a matter of concern as well. A recent study shows people, who used light emitting devices before sleep, felt sleepier even after eight hours of sleep compared to those who were not exposed to such devices.
Sleep is not the only functions which get affected by Light. Recently a study has proven that a Shift in body clock can have a devastating effect on functions of other organs which depends on the circadian cycle.
Although overexposure to blue light has many negative effects, it has a positive side as well. Let’s see how blue light can be used for our benefit.
POSITIVE APPLICATIONS OF BLUE LIGHT
REALIGNING BODY CLOCK
When required, the Light of High energy and shorter wavelength can be used to change the body clock and induce alertness in an individual. Such technique is useful for people who need to be at peak alertness, with jet lag, and works in a shift.
Blue Light therapy has been shown to be effective in treating severe conditions, including depression, sleep disorders, eating disorders, and age-related dementia.
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