Discover Transitions® GEN S™ lenses

Moving between your glasses and sunglasses throughout the day can be inconvenient. Transitions® GEN S™ lenses make things simpler by staying clear indoors and darkening automatically outdoors. They adapt as the light changes, helping you see comfortably throughout your day. Here’s how they work and how to choose a pair.

- 4 minutes to read


Technology designed to adapt


GEN S lenses are the result of five years of research and development, including tests on more than 100,000 lenses. Their colour-changing dyes and lens material are designed to work together, helping the lenses remain durable while switching quickly from clear to tinted and back again.


Why Choose Transitions®
GEN S™ Lenses?


Transitions GEN S lenses offer the convenience of glasses and sunglasses in one pair. They adapt quickly as the light changes to help you see comfortably at work, at home or while you’re out and about. Choose from eight true-to-tone colours, including Ruby. In Transitions’ wearer research, eight in ten people rated GEN S the best lenses for an everyday pair of glasses. [3]

How to get Transitions®
GEN S™ Lenses at Vision Express


Ready to find your pair? Transitions GEN S lenses can be added to most frames at Vision Express, with or without a prescription. If you need a new prescription, start by booking an eye test with one of our expert optometrists. You can then explore our glasses range, choose your frames and find the colour that suits you. Our team will guide you through the lens options for your day. Prefer to see them in person? Pop into your nearest store and we’ll show you how they adapt.

The Transitions® range 

GEN S is part of the wider Transitions range. Visit us in store to explore the available options and speak to our team about which lenses could work best for you.

Book an eye test

Type in 2 or more characters for results. When autocomplete results are available, use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gesturesNo results found, use down to share your current location
Find a store

Sources

[1] Transitions Optical study (2023), led by Prof. Billy R. Hammond — a subject-masked controlled trial of 30 participants found the lenses gave 39% faster recovery from bright-light glare than clear lenses.

[2] ISO/TR 20772:2018 (iso.org) — defines the blue-violet light band as 400-455nm.

[3] Transitions Optical — in the maker's own wearer research, eight in ten wearers rated these the best lenses for an everyday pair of glasses.

Disclaimers

  1. For grey polycarbonate & CR39 lenses achieving 18% transmission @ 23°C.​
  2. For grey polycarbonate & CR39 lenses with a premium anti-reflective coating fading back to 70% transmission @ 23°C.​
  3. Compared to clear lenses. Subject-masked cross-over randomized controlled investigation performed in 2023 on 30 healthy participants (19.2 ± 1.3 years). Testing light stress (discomfort and disability glare, photo-stress recovery) with the clear and darkest states of Transitions GEN S Grey 1.6 index lenses with a premium anti-reflective coating compared to clear 1.6 index lenses with a premium anti-reflective coating. Principal investigator Prof Billy R. Hammond.
  4. For polycarbonate and CR39 lenses across colours. Blue-violet light is between 400 and 455nm (ISO TR 20772:2018).