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TRANSITIONS® LENSES FROM ZENNI

Lenses that darken when outdoors and return to clear when indoors, automatically adapting to changing light.

Move Freely in Any Light

Ultra dynamic light intelligent lenses.
Glasses over two circles, one white and one black, with speed lines indicating tint changing.

Seamless Fabulous

Light intelligent lenses seamlessly change from clear indoors to dark outdoors.
Glasses superimposed over a shield image. A sun has an arrow coming from it, that bends away as it nears the glasses, indicating sun’s rays being reflected away.

Always-On Protection*

Block 100% of UVA and UVB rays and filter blue-violet light.*
Glasses with 4-point star sparkles on them, indicating good style.

Style Booster

Choose from a wide range of lens colors to express your personal style.
Symbol made from a blue half circle and a blue arch. The Transitions logo and the text: Certified Provider.
A woman in tortoiseshell glasses with ruby red Transitions Gen S lenses that change from clear to dark.Transitions® Gen S™ logo
Transitions® GEN S™New amazingly fast Transitions in 8 vivid colors.
An Asian woman with long black hair wearing clear geometric frame glasses with Transitions lenses that turn from clear to dark.Transitions® Xtractive® logo
Transitions® XTRActive®The darkest lenses, ideal for light sensitivity.
A man with short brown hair wearing black rectangular frames with Transitions lenses that turn from clear to dark.Transitions® XTRActive® Polarized™ logo
Transitions® XTRActive® Polarized™Polarized to defy bright light and reflective glare.
A woman sitting in the front seat of a car wearing round glasses with Transitions Drivewear lenses that change from dark to darker.Transitions® Drivewear® logo
Transitions® Drivewear®Sunglasses that adapt to light while driving or outdoors.
Best for
The best everyday lens if you want the fastest clear to dark, and dark to clear lens.
Best everyday lens for those who want clear lenses indoors and the darkest lens outdoors.
Best if you want clear lenses indoors and dynamic polarized sunglasses outdoors.
Best if you want polarized sunglasses that adapt to changing light in the car and outdoors.
Lens indoor / unactivated
Fully clear lens
Clear lens with a hint of protective tint
Clear lens with a hint of protective tint
Always tinted lens, never clear
Lens outdoor / fully-activated
Dark lens
Extra dark lens
Extra dark lens
Extra dark lens
Time to darken / return to clear
UVA / UVB rays blocked 100%
Blue-violet light filtering
Polarization capabilities
Dynamic polarization
Always-on polarization
Lens activates behind windshield
Colors available
8 vibrant colors:Amber, Amethyst, Brown, Emerald, Graphite Green, Gray, Ruby, Sapphire
Brown, Gray
Gray
Tint shifts from Olive to Copper to Deep Brown
Tint shifts from Olive → Copper → Deep Brown
Starting price
$89.95
$119.95
$121.95
$123.95
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Ultra Dynamic Lenses

Move the slider to visualize how Transitions GEN S lenses change tint.
Black and gold browline frames with lenses that change from clear to dark when the user moves the slider.
Black and gold browline frames with lenses that change from clear to dark when the user moves the slider.
IndoorsOutdoors

Move Freely with Transitions® Lenses

In today’s fast-moving world, where change is constant, our lives—and our eyes—are always adapting. Designed for those who thrive in motion, Transitions® lenses adapt seamlessly to any light, enhance your vision experience and style, while providing always-on protection.

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Filters
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Shop Transitions® Glasses

Add Transitions® light intelligent lenses to any frame for glasses that seamlessly adapt to changing light. Block UV rays and blue-violet light. Move freely in any light with Transitions®.
Add Transitions® light intelligent lenses to any frame for glasses that seamlessly adapt to changing light. Block UV rays and blue-violet light. Move freely in any light with Transitions®.
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Transitions FAQ

Transitions Gen S lenses are formulated to be ultra responsive to light and in most conditions will darken in seconds outdoors and return to clear indoors very rapidly (around 2 minutes). Please note that temperature can affect the speed of these chemical changes within the lens, with optimal change occurring at 23ºC.

Gen S lenses are also the first to feature the new vibrant Ruby Red lens color option, along with seven other stylish lens color choices, all of which return to clear indoors.

Like all Transitions lenses, Gen S lenses block 100% of UVA and UVB light. They also filter up to 32% of blue-violet light indoors and up to 85% of blue-violet light outdoors. (Blue-violet light is measured between 400 and 455 nm.)

No, Gen S lenses are not polarized. However, they do achieve Category 3 darkness to ensure your vision comfort in bright outdoor light, along with UV and blue-violet light protection.

Transitions® lenses are the top-performing photochromic lenses on the market. Transitions lenses change more quickly than other photochromic lenses and activate up to a category 3 darkness outdoors. Plus, they pack the value of hassle-free comfort, versatility, and protection. Transitions lenses are great if you are looking to make a single purchase because they offer the benefits of clear lenses, sunglasses, and blue-light blocking lenses all in one photochromic package. Zenni is proud to offer the best value for Transitions® lenses on the market. For more information about Transitions® lenses, visit https://www.transitions.com/en-us/.

The molecules in photochromic technology work by reacting to UV light. However, temperature can affect the molecules’ reaction time. Colder temperatures mean molecules move more slowly, and it will take longer for Transitions lenses to adapt from dark to clear, even on sunny days. Warmer temperatures mean molecules speed up and become more reactive, meaning a faster fade back from dark to clear. Moving from sun to shade in warmer climates, your lenses will be quicker to detect the diminished UV rays and will lighten in color. Transitions® GEN S™ lenses are more responsive than previous generations: fully clear indoors, darker outdoors, and returning to clear indoors, faster than ever. For more information about Transitions® lenses, visit https://www.transitions.com/en-us/.

You can wear most Transitions® lenses at night. Because the lenses darken in response to UV light, the primary source of which is the sun, they will remain clear in nighttime conditions, even in the presence of headlights or streetlights. NOTE: Transitions® Drivewear® lenses should not be worn at night because they are sunglass lenses that have a constant tint that darkens or lightens slightly depending on daylight conditions.

Transitions® GEN S™ lenses turn completely clear when indoors and not exposed to UV light. Transitions XTRACTIVE lenses remain very slightly tinted indoors. Transitions® Drivewear® are sunglass lenses that have a constant tint that darkens or lightens slightly depending on daylight conditions.

Yes! All photochromic lenses offered at Zenni are great options for your general eye health. In addition to blocking 100% of UVA/UVB light, the adaptive, two-in-one nature of photochromic glasses reduces squinting and eye fatigue. For those looking to replace their sunglasses with a photochromic lens, we suggest choosing Transitions® Drivewear®, which will also protect your eyes in the car by darkening while you drive and polarizing in direct sunlight for clearer sharper vision.

To preserve the longevity and performance of your Transitions lenses, clean them regularly with a soft, lint-free cloth. Don’t use abrasive substances or harsh chemicals on Transitions lenses. For a more thorough cleanse, use a mild lens cleaner, followed by drying with a clean cloth. Regular cleaning of your Transitions lenses not only guarantees crystal clear vision but also extends the lifespan of your eyewear.

You bet! Our Transitions glasses are specifically designed to accommodate a broad variety of activities. Their swift adjustment to fluctuating light conditions makes them an excellent choice for all kinds of sports and outdoor activities. Whether you're a cycling enthusiast, adventure-seeking hiker, or golfing pro, Transitions sunglasses will provide you with a clear view and UV protection when you need it most.

Absolutely! Photochromic lenses are a marvel of modern eyewear technology. Not only do they function as regular transition eyeglasses, but they also seamlessly darken into sunglasses when exposed to direct sunlight. With these high-tech lenses, you’ll no longer need to switch between prescription glasses and sunglasses. They’ll adjust automatically based on their exposure to UV light.

Transitions® Drivewear® lenses utilize advanced photochromic technology to dynamically respond to UV light and sunlight. They are always polarized to minimize reflective glare. In low-light conditions, the lenses have an olive-green tint, which enhances contrast and visibility. As the lighting becomes brighter, they shift to copper and dark brown tints, helping to reduce glare in intense light conditions.

The apparent color of a lens is highly sensitive to the total amount of light passing through the lens, as colors appear less vivid, the darker they are. When one is wearing the lens, relatively little light passes through the back of the lens since the lens is nearer to a person’s face compared to when it is backlit, against a bright backdrop, or looking through the lens at a light source. As a result, colors may appear less vivid to the observer when being worn. Furthermore, this effect can be exacerbated when one is looking at oneself wearing the lenses in a mirror as the reflected light from the mirror has to once again pass through the lens on the way to the eye, making the lens appear even darker and thus less colorful.

1The darkest in hot temperatures and in the car, in the clear to extra dark photochromic category. Tests on polycarbonate and 1.5 gray lenses.

2The darkest in hot temperatures & in the car, blocking 100% UVA & UVB and offering the best overall blue-violet light filtration across light situations* among clear to extra dark photochromic lenses.*Filtering blue-violet light (between 400 and 455nm ISO TR 20772:2018) among polycarbonate and CR39 gray lenses with a premium anti-reflective coating : filtering (i) up to 45% indoors at 23°C, (ii) up to 64% behind the windshield (iii) up to 86% outdoors at 23°C and (iv) up to 83% outdoors at 35°C.

3Transitions lenses filter at least 26% of blue-violet light indoors and at least 86% outdoors. Tests performed on grey lenses with a premium anti-reflective coating. Blue-violet light is between 400 and 455nm (ISO TR 20772:2018).

4Clear to extra dark photochromic category. Tests across polycarbonate and 1.5 gray lenses at 35°C achieving <18%T using Transitions Optical's standard testing method.

5Clear to extra dark photochromic category. Polycarbonate and 1.5 gray lenses tested at 23°C behind the windscreen achieving between 18%T and 43%T.

Transitions®, Transitions® Signature®, and XTRActive® are registered trademarks, and XTRActive® Polarized™, the Transitions® logo and Transitions® Light Intelligent Lenses™ are trademarks of Transitions® Optical, Inc. used under license by Transitions® Optical Limited. GEN S™ is a trademark of Transitions® Optical Limited. ©2025 Transitions® Optical Limited. Photochromic performance and polarization are influenced by temperature, UV exposure and lens material.

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