Do transition lenses block blue light?

Transition Lenses and Blue Light Blocker: What You Need to Know

In today’s digital age, protecting our eyes from harmful blue light emitted by screens is a growing concern. Enter transition lenses, known for their photochromic properties. But do these lenses also block blue light? Let’s dive in and uncover the truth.


1. Transition Lenses: A Brief Overview

Transition lenses, often referred to as photochromic lenses, are clear indoors and darken automatically when exposed to sunlight. Their primary function is to provide comfort by adjusting to varying light conditions and offer protection against harmful UV rays.

2. Blue Light and Its Implications

Blue light, a high-energy visible (HEV) light, is emitted by digital screens, LED lights, and even the sun. Prolonged exposure to blue light, especially from digital devices, has been linked to digital eye strain and potential disruptions to our sleep-wake cycle.

3. Do Transition Lenses Block Blue Light?

The answer is yes. Transition lenses are designed to block a portion of blue light. When activated by UV light (when they darken), transition lenses block even more blue light than when they’re clear. It’s worth noting, however, that the degree of blue light blocked can vary depending on the specific type and brand of transition lenses.

4. How Effective Are They?

Transition lenses block approximately 20% of harmful blue light indoors and over 85% outdoors. The outdoor efficiency is particularly noteworthy, considering the sun emits a significant amount of blue light, more than any digital device.

5. Other Blue Light Blocking Options

If you’re particularly concerned about blue light exposure, especially from screens, several other options might complement or serve as alternatives to transition lenses:

  • Blue Light Glasses: Specifically designed to filter out blue light from screens.
  • Screen Filters: Attachable filters for digital devices to reduce blue light emission.
  • Digital Habits: Taking regular breaks and using device settings that reduce blue light during evening hours.


While transition lenses primarily cater to adapting to light changes and protecting against UV rays, they also offer the added benefit of blocking a portion of blue light. For those balancing outdoor activities with digital screen time, transition lenses can be an effective choice in eye protection.

In the quest for optimal eye protection, transition lenses emerge as a multi-faceted solution, combining adaptive lighting and blue light blocking capabilities.


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