Sunglasses are essential in winter, especially if you are taking part in winter sports or driving a vehicle. Not only should you wear sunglasses to protect your eyes from harmful UVA and UVB rays, but having the right eyewear will make you safer on the roads and give you better visual clarity outdoors.
With the changeable winter climate and temperamental skies, variable tint lenses or ‘photochromic’ lenses make a great option. Designed to adapt to changing light conditions, they are ideal for the ever-changing weather and they will see you through to summer too.
What Are Photochromic Lenses?
These lenses are clear indoors, but a chemical reaction within the lens causes them to darken after about 30 seconds of exposure to ultraviolet radiation from sunlight. After moving indoors, the lenses become clear again within a few minutes. Adaptive lenses are available in a range of materials, lens colors, and lens treatments such as anti-glare coatings. Some adaptive lenses become polarized as they tint. Even some prescription progressive and bifocal eyeglasses can use Transitions lenses.
Type of Activity
When trying to decide between the two, first consider what you spend the majority of your time doing.
Adaptive lenses are convenient for quick trips in and out.
For activities that include time on the water or snow—where bright light may reflect back at you—prescription sunglasses with polarized lenses may be better suited to the job.
Adaptive lenses react differently to glare from shiny surfaces such as snow and water, so they may not darken enough to meet your needs.
Photochromic performance can be influenced by temperature, so lenses can also take longer to adjust in cold temperatures.