Sunglasses with Photochromic Lenses Explained
Photo by Ali Madad Sakhirani
The world of eyewear has seen remarkable advancements over the decades, but among them, photochromic lenses stand out as an innovative solution. Often referred to as light-adaptive or variable tint lenses, these lenses seamlessly adapt to changing light conditions. If you've ever wished for glasses that conveniently switch between clear lenses indoors and sun-tinted lenses outdoors, photochromic lenses might be the answer.
What are photochromic sunglass lenses?
Photochromic lenses, popularly known as transition lenses due to the prominent brand, Transitions Optical, are specially crafted to automatically darken when exposed to ultraviolet (UV) rays and clear up in the absence of them. This makes them especially useful for those frequently transitioning between indoors and outdoors. Originating from Corning Glass Works Inc. in the 1960s, they represented the first variable tint/photochromic lenses introduced to the market.
Photochromic Lenses vs. Transition Lenses
While many people use the terms interchangeably, it's essential to understand that photochromic refers to the lens technology that allows for the change in tint. In contrast, "Transition" refers to the leading brand name of photochromic lenses in the US. So, while all Transition lenses are photochromic, not all photochromic lenses are from the Transitions brand.
Photochromic Lenses vs. Polarized Lenses
Photochromic and polarized lenses serve different purposes. While photochromic lenses adjust their tint based on light exposure, polarized lenses reduce glare from surfaces like water, roads, and cars. It's possible, though uncommon, to find sunglasses that combine both these features – offering adaptability in tint and reducing glare.
Do photochromic lenses get as dark as sunglasses?
While photochromic lenses offer significant darkening in bright sunlight, they might not achieve the full darkness some sunglasses provide. For those needing deeper tint for specific activities or conditions, a dedicated pair of sunglasses might still be necessary.
Can you wear photochromic lenses all the time?
Absolutely! The light-adaptive nature of photochromic lenses makes them ideal for continuous wear. They adjust to indoor and outdoor lighting, offering clear vision and UV protection. This adaptability eliminates the need to switch between regular glasses and sunglasses, making life more convenient.
How long do photochromic sunglasses last?
The lifespan of photochromic lenses generally aligns with the duration of a prescription. Plastic photochromic lenses can outlast the usual prescription term, which is about 2.5 years. Interestingly, glass photochromic lenses improve with age and retain their darkening ability throughout their life.
Are photochromic sunglasses good for driving?
Yes, photochromic lenses can enhance safety while driving. They adjust to changing light conditions, ensuring optimal vision whether you're driving during the day or at night, providing protection against bright sunlight and UV rays.
Are transition glasses for old people?
Transition lenses, with their ability to adjust to varying light conditions, aren't exclusive to any age group. They are as suitable for children, who might find managing multiple pairs challenging, as they are for adults. The convenience and functionality they offer make them a universal choice, regardless of age.
Conclusion
Photochromic or transitional lenses have revolutionized the way we perceive eyewear. By merging the benefits of regular glasses and sunglasses, they offer a cost-effective and functional solution for many. Whether indoors, outdoors, or on the road, these lenses ensure that you're always seeing the world in the best light. If you find yourself frequently transitioning between different lighting environments, photochromic lenses might just be the perfect eyewear solution for you.
