Photochromic & Transitions Lenses
Photochromic & Transitions Lenses
Photochromic lenses — sometimes called Transitions after the best-known brand — are clear lenses that darken in sunlight and lighten back to clear indoors. One pair of glasses for every light condition.
How photochromic lenses work
The lens material contains light-reactive molecules that change shape when they absorb UV light, causing the lens to darken. When UV exposure stops, the molecules revert and the lens clears.
The full transition takes around 30 seconds outdoors and a minute or two back to clear indoors.
What photochromic lenses are good for
- Heavy outdoor users who don’t want to swap glasses constantly
- People who travel between indoor and outdoor environments often during the day
- Anyone who finds carrying two pairs of glasses inconvenient
What they’re less ideal for
- Driving — most photochromic lenses don’t darken fully behind a windscreen because car glass blocks most UV. Drive-X and Transitions XTRActive are exceptions designed to react to visible light too, but even these don’t match dedicated sunglasses.
- Cold weather sports — cold temperatures slow the transition speed
- People who want a specific tint colour — most photochromic lenses transition to grey or brown only
Transitions vs other photochromic brands
Transitions is the original and most widely available brand. We also fit Zeiss PhotoFusion, Hoya Sensity, and other premium photochromic options. The performance differences between top-tier brands are small — usually transition speed and final darkness.
Photochromic vs prescription sunglasses vs Transitions
| Option | Best for | Trade-off |
|---|---|---|
| Photochromic | One pair for indoor and outdoor use | Doesn’t fully darken behind a windscreen |
| Prescription sunglasses | Strongest UV protection, full darkness, polarised options | Need a separate pair for indoors |
| Two separate pairs | Best of both — swap as needed | Two purchases, two cases to carry |
Frequently asked questions
Do photochromic lenses work in cars?
Standard photochromic lenses don’t darken fully behind a windscreen because the glass blocks UV. If you drive often, dedicated prescription sunglasses are usually more comfortable.
How long do photochromic lenses last?
The light-reactive performance gradually weakens over 2–3 years of daily wear. The lenses still work as clear prescription lenses indefinitely — they just lose some of their darkening response over time.
Can I get photochromic on varifocal lenses?
Yes — photochromic is available across all our varifocal tiers.
What colour do they go?
Most transition to grey or brown. We can advise which is available for the lens type and prescription you choose.
Can I add photochromic to lenses I already have?
No — the photochromic property is built into the lens material during manufacture. New lenses would need to be made.
Want photochromic on your next pair? Talk to an Ardor advisor →