Blue light - the good, the bad, and the invisible

Blue light is all around us. Natural blue light from the sun is essential for good health and is known to boost alertness, help with memory and cognitive function, as well as elevate your mood.

Blue light is part of the visible light spectrum. Visible light is measured in nanometers and it's wavelengths vary from 380 nanometers (violet light) to 700 nanometers (red light). Blue light has high-energy, short waves, which are only slightly longer and less powerful than ultraviolet (UV) waves. 



Unfortunately, though, the blue light being emitted from devices or monitors is considered unnatural blue light.

When you are looking at any smart device’s screen or monitor over long periods of time, it can become difficult to focus due to the reduced contrast of the unnatural blue light, which contributes to digital eye strain.

Exposure to blue light later in the afternoon or at night can also mess with your natural sleep/wake cycle - known as your circadian rhythm. So the more blue light you are exposed to, at the time of the day that your body is not built to encounter blue light, can confuse your natural cycle and make getting to sleep or having a full, uninterrupted, sleep more difficult.

Tone Down Tech lenses 

At TDT we believe that, given the amount of time we spend in front of our screens and how close we sit to those screens every day, It's vital to be relieving some of that strain on our eyes by shielding them from some of this unnatural blue light. 

TDT's blue light filtering glasses block the majority of blue light at 420nm and filter blue light up to 480nm. As soon as you put them on you will notice an immediate toning down effect. The lenses are clear to look at however once you have them on, you notice a slight yellow shade and an instant ease to your eyes.