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What are Photochromic Lenses?

Photochromic lenses are glasses lenses that react to different levels of UV light. When exposed to bright light on a sunny day, molecules in the lens react and become darker, offering protection from the sun’s radiation. As light levels decrease, the molecules go back to their original state and become transparent once again. Photochromic lenses only react when exposed directly to UV light, meaning that these lenses cannot change color in car or near windows as the windshields / windows will block UV radiation.

Available colors:

Why Choose Photochromic Lens (Light-adjusting)

Avoid bright light stimulation

Unable to see clearly with sunglasses

Reduce eye strain

Protect your child's eyes

How do Photochromic lenses work?

Photochromic lenses are coated with special molecules, such as silver chloride, that change shape and absorb light when exposed to UV rays. It is this reaction that causes them to darken in sunlight. When taken away from UV light, the process reverses, causing the lenses to gradually become lighter. The lenses typically take around 15 minutes to fully darken, although some change will be seen within the first minute.

These lenses are designed to quickly adjust from clear to dark.
This allows eyeglasses and sunglasses to be one.


Outdoor / Cloudy

Outdoor / Strong light

May not darken inside a car or near windows
since most windshields / windows block UV rays needed to darken the lenses.

Transitions ® VI Lenses are brand photochromic lenses, which contain patented photochromic dyes. They are available in gray, and brown. The lenses are fully clear indoors and are more responsive to sunlight, so they are darker when you need them to be. Our Transitions ® lenses personalize any frame, allowing you to further express your style. Pick your color, choose your style, and you can find a pair of perfect glasses that complement your everyday.

How to select this kind of lens?

Step 1: Find your favorite frames.
Step 2: After you select lens usage, and enter your prescription, then comes to the lens type.
Step 3: Choose Photochromic and select color.
Step 4: Select coatings as you like, add to cart and check out, then you can have the sun perfection tinted lenes.
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