The majority of customers interested in purchasing photochromic eyewear usually have valid concerns regarding the darkening performance of the lenses. These are especially important for individuals wearing prescription photochromic eyewear.
Thoroughly addressing these concerns depends on the type of glasses and the environmental conditions. However, understanding some basics regarding photochromic eyewear will provide a solid start for making the best choice.
- How do photochromic lenses work?
Photochromic compounds are built into the lens, and the sun’s UV rays trigger the compounds to darken. Away from sunlight, lenses reverse back to a clear state through a thermal process. Beyond this basic process, environmental conditions can significantly impact the performance of photochromic eyewear.
How well do photochromic lenses work in cold weather?
They actually get their darkest in cold weather, which makes them more suitable for snow skiers than beachgoers. However, once inside and away from the triggering UV light, cold lenses take longer to regain their clear color than warm lenses.