It's the question we get asked most often online: "Do my sunglasses protect me from screens?" or "Is my blue light filter enough for the beach?"
The short answer is: No, they are two different dangers. To keep your vision healthy, it is crucial to understand the distinction between UV rays (the sun) and blue light (digital screens).
1. UV (Ultraviolet): The Invisible Danger
UV rays are emitted by the sun. They are invisible and don't feel hot, but they are the most dangerous for long-term eye health (cataracts, premature aging).
- Where? Outdoors, even on cloudy days.
- The Solution: Sunglasses (category 3 or 4) or clear prescription lenses treated with "100% UV" protection.
2. Blue Light: Digital Fatigue
Blue light is part of the visible light spectrum. It is emitted by the sun, but mostly by our LED screens (smartphones, computers) which we stare at from very close range.
- Symptoms: Headaches at the end of the day, stinging eyes, difficulty falling asleep at night.
- The Solution: A "Blue Light" coating that filters the harmful peaks of this artificial light.
Visionet Tip: If you work more than 3 hours a day on a screen, the blue light option is almost essential to reduce visual fatigue.
3. The Match: What Do You Need?
To simplify your choice when ordering lenses:
- I am driving or at the beach: You need UV400 protection (Sunglasses).
- I am working in the office or gaming: You need a Blue Light filter.
- I want both? Choose Photochromic lenses. They are clear indoors (filtering blue light) and darken in the sun (blocking 100% of UVs).
