Do photochromic (transition) lenses filter blue light? Yes, but blue light filtering is not the primary reason people use photochromic lenses. 

Most people buy photochromic lenses to ease the transition from artificial (indoor) to natural (outdoor) lighting. Because photochromic lenses have the ability to darken in the sunlight while providing UV protection, they eliminate the need for prescription sunglasses.

Plus, photochromic lenses have a third benefit: They filter blue light — both from the sun and from your digital screens.

Photochromic lenses filter blue light from screens

Are photochromic lenses good for computer use? Absolutely!

Although photochromic lenses were designed for a different purpose, they do have some blue light filtering capabilities.

While UV light and blue light are not the same thing, high energy blue-violet light is next to UV light on the electromagnetic spectrum. While most exposure to blue light comes from the sun, even inside a home or office, some blue light is also emitted by your digital devices. 

Glasses that filter blue light, also called “blue light-blocking glasses” or “blue blockers”, may help improve visual comfort during long periods of computer work. 

Photochromic lenses are designed to filter some of the highest energy level on the light spectrum, which means they also filter some blue-violet light.