4 Negative Effects Blue Light Has On Our Health And Sleep

Updated: Sep 4

We all know that blue light emitted from smartphones, tablets and laptops can be bad for our eyes. But did you know it can also affect our sleep and overall health?


If you work with a computer all day, you are most likely exposed to blue light. But what exactly is blue light? And how does it affect your health and sleep? This blog article will answer these questions, and more.


What is Blue Light?

Blue light is the shortest wavelength in the visible spectrum, which means it has more energy than other colours of light. Blue light is also very common in our environment because it’s produced by many types of electronic devices. Here are some negative effects of blue light on the body.

  • Blue light interferes with your body's ability to produce melatonin, the hormone that helps regulate your circadian rhythm (your internal clock).

  • An increased risk of depression. One recent study found that people who use their smartphones at night have an increased risk of developing depression compared with those who don’t use their phones at night.

  • Blue light is linked to problems like blurry vision, eyestrain, dry eye, macular degeneration, and cataracts.

  • Blue light wakes you up and stimulates you, during the day. It also starts the production of cortisol (stress hormone) and ghrelin (nicknamed the “hunger” hormone). Unbalanced hormone levels can contribute to fatigue

Here are some tips to combat Blue light:

  • Cut down on screen time

  • Take a break from blue light at night

  • Use Blue light blocking glasses or screen protector which blocks blue light

  • Use low blue light bulbs

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