How to Check if Your Glasses Block Blue Light: 1 Minute to Identify Blue Light Glasses Effectively

With the rising concerns about digital eye strain, many people are investing in glasses marketed as “blue light blocking.” But how can you be sure your lenses are actually reducing blue light exposure? Here’s how you can check if your glasses are genuinely effective at filtering blue light and some methods you can use at home before relying on more specialized testing services.

First, inspect your glasses in natural and artificial lighting. Blue light blocking lenses often have a subtle yellow or amber tint, which helps filter out high-energy blue wavelengths. Hold your glasses up to a white background—if you notice a faint yellow hue, this is a good sign that your lenses are filtering some blue light. However, not all blue light coatings are colored, so this isn’t a definitive test.

Next, look for a reflection test. Under direct light, such as from your smartphone or a lamp, observe the glare bouncing off your lenses. A blue or purple reflection often indicates a blue light coating. This is an immediate visual cue, but keep in mind that it only shows that there is a coating, not necessarily its effectiveness.

For a more hands-on approach, use a blue light torch. These small LED lights are specifically designed to emit blue light. Shine it through your lenses onto a white surface. If a significant amount of blue light appears to be blocked or reduced, your glasses are likely working as intended. Some online retailers may even include a blue light test card to further demonstrate the effectiveness.

If you want more scientific certainty, take your glasses to an optician—many have spectrometers to measure exactly how much blue light your lenses block. Meanwhile, as a designer, I always recommend considering the visual comfort and color fidelity required for your work environment. The design of your workspace, including lighting and monitor placement, also impacts your experience. Incorporating thoughtful workspace layout and lighting solutions can complement the efficacy of your blue light glasses, ensuring both your eyes and your interiors are cared for in the best possible way.

Tips 1:

If you work long hours at a computer, combine blue light blocking glasses with regular breaks, proper screen distance, and ambient lighting to reduce overall eye strain.

FAQ

Q: What is blue light and why is it harmful?

A: Blue light is a high-energy visible light emitted by digital screens and LED lighting. Excessive exposure can cause digital eye strain, disrupt sleep patterns, and may contribute to eye discomfort.

Q: Can I tell if my glasses block blue light just by color?

A: Not always. Some blue light coatings are clear, while others are tinted. Color alone isn’t a guaranteed indicator.

Q: Are there apps to test blue light blocking glasses?

A: Currently, reliable results require physical tools or tests. Some apps exist, but their accuracy is limited.

Q: Do all “computer glasses” block blue light?

A: No, some may only offer anti-reflective coatings. Look for certifications or specific blue light blocking claims.

Q: How often should I check my glasses for blue light blocking effectiveness?

A: If you suspect the coating has worn off or you notice more eye strain, it’s a good idea to check, either at home or through an optician.