Blue light glasses

Blue Light Glasses: Do They Work?

October 19, 2023


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In the age of digital screens, many of us spend a significant portion of our day staring at glowing devices, from computer monitors and televisions to smartphones and tablets. Along with the rise in screen time, there’s been a surge in concern about the potential harm caused by prolonged exposure to blue light.

Enter blue light glasses, the stylish solution touted to shield our eyes from the effects of this high-energy light. But do these glasses deliver on their promises? Let’s dive in.

What is Blue Light?

Before assessing the efficacy of blue light glasses, let’s understand what blue light is and why Doctor Van, your Loveland optometrist at Van’s Eyecare, considers it to be potentially harmful. Blue light has a short wavelength and produces higher amounts of energy. Sources include the sun, digital screens, and certain types of artificial lighting.

Prolonged exposure to blue light, especially from screens, has been linked to:

  1. Eye strain: Staring at screens, especially for extended periods, can lead to symptoms like dry eyes, blurry vision, and difficulty focusing, a condition often referred to as digital eye strain or computer vision syndrome.
  2. Disruption in Circadian Rhythm: Blue light can interfere with the production of melatonin, a hormone that regulates sleep. This disruption can lead to sleep disturbances or difficulty falling asleep, especially when exposed to screens in the evening.

The Case for Blue Light Glasses

Manufacturers of blue light glasses claim that their products can filter out a significant portion of this harmful light, thus offering the following benefits:

  1. Reduced Eye Strain: By blocking a percentage of blue light, these glasses may reduce the symptoms associated with digital eye strain.
  2. Improved Sleep: By wearing blue light glasses in the evening, some users believe they experience fewer disruptions in their sleep patterns, thanks to the reduced blue light exposure affecting melatonin production.

What Does the Science Say?

Research into the effectiveness of blue light glasses has been either positive or neutral. Some studies suggest that blue light can affect our circadian rhythms, and by that logic, blocking it could be beneficial. However, other research suggests that the amount of blue light emitted by screens might need to be more significant to cause these disruptions, at least not to the degree often claimed. 

Regarding eye strain, it’s not just blue light that’s the culprit. Factors like screen brightness, screen distance, blink rate, and extended use without breaks can all contribute to digital eye strain. Therefore, while blue light glasses might provide some relief, they aren’t a panacea.

Practical Tips and Recommendations

  1. Follow the 20-20-20 Rule: Every 20 minutes, take a 20-second break and focus on something 20 feet away. This pause can help reduce eye strain.
  2. Adjust Screen Settings: Ensure your screen’s brightness and contrast settings are comfortable, and consider using apps or features that reduce blue light, especially in the evening.
  3. Blink More Often: Make a conscious effort to blink regularly to moisten the eyes and reduce dryness and irritation.
  4. Try Blue Light Glasses: They might work well for you. While the science might be inconclusive, many people swear by it, and the placebo effect can be powerful. If you find relief, it’s a win. Simply ask Doctor Van or one of our opticians at Van’s Eyecare in Loveland to help you find the perfect pair.


While blue light glasses might offer some benefits, they aren’t a one-size-fits-all solution. It’s essential to recognize that screen habits, individual sensitivities, and other factors play a role in our experience with digital devices. As with any wellness product, what works for one person might not work for another. So, while they’re worth a shot, it’s equally crucial to prioritize good digital hygiene overall. 

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