Swanwick is the only brand of blue light blockers that have routinely sought third party validation. We've been studied by the University of Washington and the University of Indiana. We've been featured in a study by SleepScore Labs, and had research findings published in the Journal of Applied Psychology and Harvard Business Review.

There is no other brand on the market that has gone to the lengths we have to make the validation of our technology the backbone of our company. Talk is cheap in the blue light world. Why Swanwick? Because our actions speak way louder than their words.

When shopping for blue light blocking glasses, it’s essential to find the details about not just how much blue light they block but also what range of the light spectrum they block as it pertains to the time of day you’re wearing them.

During daytime hours, some ranges of the light spectrum are beneficial to our health, so it’s important that some blue light is still allowed through the lenses in daytime hours. However, in the hours before bed, you need to block the full spectrum, which is what our Night Swannies are made for.

For example, Day Swannies block between 45-98% of blue light between 400-450nm, which studies have shown is the most harmful part of the spectrum.

They allow some blue rays in the range of 450-500nm to get through, as exposure to this range during the day is important for giving your body the signals that it is daytime and that it should be awake.

You’ll find most clear-lens blue blockers on the market only block blue light up to 420nm. Day Swannies, however, block 98% of blue light at 400 nanometers, graduating to 45% at 450nm. This is considered the most harmful part of the spectrum. Our daytime lenses are optimized to let just the right amount of beneficial light through while blocking the harmful spectrums.

Conversely, Night Swannies block over 99% of blue light, which is crucial for helping your body slip into a natural sleep rhythm by promoting melatonin production.

Blue light has been shown to inhibit the body's ability to produce melatonin, the hormone that helps us get to ssleep, stay asleep, and achieve quality sleep. When worn in the hours before bedtime, Night Swannies filter out this blue light so your body can produce sleep-promoting melatonin naturally, allowing your body to properly prepare for sleep, find yourself asleep faster, and sleep better all night long.

When worn during prolonged use of electronic devices, Day Swannies help prevent symptoms of digital eye strain such as sore eyes, headaches and fatigue.