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What is Blue Light?

All the light that we can see has wavelengths ranging from 380 nanometers (nm) on the blue end of the spectrum to about 700 nm on the red end. Approximately one-third of all visible light is considered high-energy visible (HEV) or "blue" light. Blue light generally is defined as visible light ranging from 380 to 500 nm. 


Blue Light is…. Good?

Contrary to popular belief, blue light isn’t necessarily bad. We are exposed to it almost everywhere and it’s actually pretty important! We receive blue light exposure from the sun, fluorescent lighting, and LED lights such as those found in computer monitors, smart phones, tablets, and most modern TVs. Exposure to blue light during daytime hours helps maintain a healthful circadian rhythm, boost alertness, help memory and cognitive function and elevates mood. Early studies even show a deficiency in blue light exposure could contribute to the recent increase in myopia/nearsightedness.

The Dark Side of Blue Light

As we all know, it is possible to have too much of a good thing! It is important that we regulate when and how much blue light we are exposed to. Excess exposure to blue light can lead to the following consequences.

1. Sore and Irritated Eyes

Prolonged exposure to blue light can cause digital eye strain that manifests in sore or irritated eyes and difficulty focusing your eyesight. If you've ever had itchy, puffy, or sore eyes after staring at a screen for hours on end, now u know why!

2. Retinal Damage

Excess exposure to blue light can also damage retinal cells which can cause major vision problems down the road due to age-related macular degeneration.

3. Sleep Issues

Blue light expose up to 3 hours before bed can throw off our natural circadian rhythm, making it more difficult to fall asleep and lessening the quality of our sleep. At night, your pineal gland secretes melatonin, which is a hormone that makes you feel tired and go to sleep. Blue light, such as from the sun and your cell phone, however, inhibits melatonin production inhibits you from getting a full and restful sleep. Lack of sleep can be linked to a plethora of other issues such as depression, grogginess, and obesity.

What can we do?

We now know that some blue light exposure during the day is healthy and beneficial. Prolonged exposure or exposure up to 3 hours before bed can have some pretty crazy adverse effects on your body. That's where Ize™ blue light glasses come in. Our anti-blue light glasses reflect and absorb light in the 380 to 500 nm to protect you from excess and untimely exposure. Most digital devices emit light from 430nm to 500nm, so our glasses are particularly focused on blocking light in this range. 

Who should use Ize™ Blue Light Glasses?

Ize™ Blue Light Glasses should be used by anyone who has prolonged exposure to blue light throughout the day or who is exposed to blue light up to 3 hours before bed. This includes:

- Gamers

- Desk Job Workers

- Late-night screen users

- Children with computers or other screen devices

- Screen addicts

The Science Behind Ize™ Blue Light Glasses

The US National Library of Medicine and National Institutes of  health are fantastic sources of credible studies and detailed information regarding blue light and the anti-blue light technology that we use make Ize™ lenses. If you want more details about the information in this article, just click on the links below for some interesting studies.

1. Blue Light and Sleep Quality
2. Light Exposure Before Bed
3. Blue Light Lenses and Sleep Improvement
4. Computer Monitors and Melatonin
5. Melatonin and the Circadian Rhythms