The blue light from countless hours on our computers, phones and tablets can have a significant impact on our health, both mentally and physically.

1Circadian Rhythm

blue light affects sleep

Everyone has a biological clock. The National Institute for General Medical Sciences explains the circadian rhythm as “physical, mental, and behavioral changes that follow a daily cycle. They respond primarily to light and darkness in an organism’s environment.”

Using your phone or watching TV in bed increases your exposure to blue light and hinders your body’s ability to produce melatonin. Melatonin is the natural hormone produced by the body to regulate sleep.

2Eye Health

blue light from devices

The more hours we put in front of a screen, the more we increase our risk of eye strain and eye damage from exposure to blue light. The eye takes it in differently than natural sunlight. This different intake has been proven to be the main cause of fatigue, headache and even eye damage.

3Mental Health & Mood

Our mood can be linked to our quality of sleep and circadian rhythms

Our mood can be linked to our quality of sleep and circadian rhythms. When we disrupt one or both of those elements, our mood, judgement, stress levels and decision making abilities can be impacted. Studies have found links between increased screen time and depressive symptoms.

4Stress and Anxiety

An overexposure do blue light can increase stress and anxiety office workers

An overexposure to blue light can increase stress and anxiety office workers. While blue light suppresses melatonin (the sleep hormone), it can also decrease the production of cortisol. Cortisol is your main stress hormone that helps your body regulate mood, motivation and fear.


You might actually have a “shield” or “filter” built right into your tablet and phone to protect against the harmful effects of blue light.

As reported by an Android Central review of the Acer Predator 8, the built-in shield “had a noticeable, and instant feeling in [the reviewer’s] eyes. Without the shield on  could feel my eyes straining at the screen. With it activated [he] felt much less strain and overall more relaxed.”

Here’s a full review by LifeWire on the best blue light filter applications.

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