Lens changes accelerated for demonstration purpose

What are Transitions® Light Intelligent Lenses™

Put simply, Transitions® Light Intelligent Lenses™, also known as photochromic lenses, darken in bright sunlight, and lighten in darker indoor spaces. Essentially, they change from glasses to sunglasses within a matter of seconds.

The process is triggered by the sun’s UV rays activating the light sensitive molecules in the lenses. The molecules react to darken the lens and protect your eyes. At night time or when indoors, the lack of UV light causes the molecules to return to their original state, leaving the lenses perfectly clear.

At SmartBuyGlasses we offer the highest quality photochromic lenses from Transitions Optical, who are experts in light intelligent lenses.

You can choose between Transitions® Signature® GEN 8™ and Transitions® XTRActive® lenses. Read on to discover which one is best for you.


As the name states, this is the signature lens from Transitions Optical. These are their fastest activating photochromic lenses2, so when you pop your head inside, you can expect a crystal clear outlook faster than ever.3 This is thanks to their breakthrough Gen 8 technology. They also block 100% of UV rays and help protect against blue light.4

With such revolutionary innovation, this is the perfect everyday lens1, and you can find it in grey or brown colour options.


What makes this lens stand out is that it darkens even in the car. The lens will remain darker behind the windshield to ensure top protection at all times.

Transitions XTRActive lenses are 100% effective at shielding eyes from UV rays, and even help block out blue light too. As a result, your eyes will remain happy and healthy when working at a computer all day!

These are available in grey and brown, and are specifically designed with car drivers on a bright, sunny day in mind. Owing to their high performance protection, you may notice a slight tint when indoors.

Blue Light Blocking UV Light Protection Behind Windshield Activation Completely Clear Indoors

Transitions, Transitions Light Intelligent Lenses and the logo are trademarks and Transitions Signature and XTRActive are registered trademarks of Transitions Optical, Inc. used under license by Transitions Optical Limited. Photochromic performance is influenced by temperature, UV exposure and lens material.