Transitions lenses have become increasingly popular for people who want visual comfort without switching between eyeglasses and sunglasses. Their secret? A smart technology that reacts to light in seconds. But how do they actually work?
Photochromic technology built into the lens
Transitions lenses contain photochromic molecules — special molecules that change shape when exposed to ultraviolet (UV) light.
- Indoors or in low light: the molecules remain stable, so the lens stays clear.
- Outdoors in UV light: the molecules activate, darken, and create a protective tint.
This reaction is fully reversible. When you move back indoors, the molecules return to their original state and the lenses gradually become clear again.
Why do they darken outdoors?
Contrary to common belief, Transitions lenses react primarily to UV rays, not just visible brightness.
That means they can still darken on cloudy days, since UV light passes through clouds. The lenses help protect your eyes from glare and harmful UV exposure.
Fast and modern light adaptation
Today’s Transitions technology is faster than ever:
- Quick darkening within seconds
- Smooth lightening when you return indoors
They also come in various tint colours (grey, brown, green, graphite, etc.) to match your style and visual needs.
UV protection and all-day comfort
By adjusting automatically to changing light, Transitions lenses help:
- Reduce eye strain
- Protect your eyes from UV rays
- Provide consistent comfort throughout the day
They’re an excellent choice for anyone active, light-sensitive, or simply looking for convenience.
