The color blue is everywhere. It’s the color of the sky, the ocean, and many things around us. How could it be harmful?


If we look at the spectrum of light that are absorbed by our eyes, we notice that there are some that we can see and some we cannot. Blue light rays sit between the two. Some parts of it are visible like the sky, and some are not, like Ultraviolet Light. Just as UV can cause cataracts without us noticing it, light in the blue spectrum can cause problems with memory and sleep.

The amount of naturally occurring blue light should not be a concern to us, but nowadays we are surrounded by artificial sources of high intensity blue light. These include digital displays of all kinds, as well as overhead fluorescent lighting. The light from these sources contain concentrated blue light, instead of a balanced spectrum made of an equal blend of all wavelengths.

Too much blue light will reduce your body’s production of melatonin, the hormone that helps regulate sleep and memory. The lack of melatonin means it takes longer to fall asleep, reduces the amount of REM sleep, and increases irritability and forgetfulness. When a person is under fluorescent lighting all day, or looking at a digital device in the dark before sleep, the effect can be more intense.


Blue light filter lenses are a way to help us recover a more natural light spectrum. They remove the concentrated artificial blue rays, and help you get a good night’s rest after a day in front of the screens. By filtering the harsh blue rays, they also give your eyes more sensitivity and contrast. If you experience dry eyes, the added comfort of these lenses will also alleviate some of your symptoms as you won’t need to blink as much.

blutech2While Blue light filter lenses have been on the market for years, many people have been reluctant to try them out because the lenses typically have a bright yellow tint. Improvements in technology have enabled the yellow tint to be barely noticeable, allowing you to continue perceiving things in their natural tones. They are especially recommended to professionals in the design and video field for this reason.

Try it today, you’ll feel the difference tomorrow and thank yourself.



Richard Li

Your optician at Appleby Opticals

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