Sunglass lenses should not be chosen only by how dark they look. UV protection, optical quality, tint colour and intended use matter more than darkness alone.
What does UV400 mean?
UV400 or 100% UV protection indicates lenses designed to block more than 99% of UVA and UVB radiation. A very dark lens without adequate UV protection is not safer than a lighter certified lens.
Main lens options
Polarised
Reduce reflected glare from horizontal surfaces such as roads and water. Useful for driving and the coast, although some displays may look different.
Gradient
Darker at the top and lighter below, useful when alternating between distance and near tasks.
Mirror coating
An outer coating reduces additional visible light and creates a distinctive appearance.
Photochromic
Change tint with UV exposure. They may darken less inside a car because the windscreen filters much of the UV.
How does colour affect vision?
- Grey: neutral colour perception.
- Brown/amber: enhanced contrast in many conditions.
- Green: balanced contrast and natural colour rendering.
- Yellow or very light tints: specialist conditions, not necessarily bright sun.
Material and prescription
Polycarbonate and other impact-resistant materials may suit active use. For prescription sunglasses, thickness, curvature, frame size and accurate centration must be considered together.
Choose the right lens for your day
Combine protection, comfort and optical quality with individual advice.
