Blue-light blocking lenses have become an essential item for anyone who spends long hours on digital screens. But did you know that not all blue-light lenses are the same? Today, we’re introducing UV420 — a premium lens material that enhances blue-light protection and delivers a better visual experience.
Two Types of Blue-Light Lenses Commonly Available
Currently, there are two popular types of blue-light filtering lenses:
- Coated blue-light lenses — lenses with an applied blue-light blocking coating
- UV420 material lenses — lenses made from a special UV420 base material
What Makes UV420 Different?
The most noticeable difference is the lens surface:
- UV420 lenses do not show blue reflections on the lens surface.
- Coated blue-light lenses have a visible blue/purple reflection due to the coating.
How They Work
- Coated blue-light lenses work by reflecting harmful blue light.
They filter only about 40–50% of harmful blue light and can block some useful blue-turquoise light as well. This often causes yellowish tint in vision — a common complaint among users.
- UV420 lenses, on the other hand, are designed to absorb harmful wavelengths while still allowing beneficial blue-turquoise light to pass through.
This results in more natural color perception and less distortion.
Why UV420 Is Superior
UV420 material doesn't just block blue light — it also protects against a broader range of high-energy visible (HEV) light, including:
- UVA
- UVB
- Harmful violet light
- High-energy wavelengths close to UV spectrum
These wavelengths are known to contribute to eye strain, long-term retinal stress, and accelerated eye aging.
UV420 Offers Better Eye Protection
✔ More natural vision
✔ No blue reflection on the lens
✔ Protection beyond blue light — including HEV, UVA, and UVB
✔ Ideal for screen users and everyday wear