Photochromic glasses are eyeglasses with lenses that automatically darken when exposed to sunlight (UV light) and return to a clear state indoors or in low light.
Here's a quick breakdown:
How they work
- The lenses contain photochromic molecules (often silver halide or organic dyes) that react to UV light.
- When UV rays hit the lens, the molecules change shape, causing the lens to absorb more light and appear darker.
- Away from UV light, the molecules revert to their original form, making the lens clear again.
Key benefits
- Two-in-one: Combines regular prescription glasses and sunglasses.
- Eye protection: Blocks 100% of UVA and UVB rays.
- Convenience: No need to switch between glasses and sunglasses.
- Glare reduction outdoors.
Things to note
- Darkening speed varies (usually 30 seconds to a few minutes).
- In a car, they may darken less because windshields filter UV light.
- Performance can be affected by temperature (slightly slower in the cold).
What's in the box
1 x Pair Photochromic Sunglasses
