aurinkosäätölaseja

Aurinkosäätölaseja, also known as photochromic lenses or transition lenses, are eyeglasses that darken when exposed to ultraviolet (UV) light, such as sunlight. When the UV light source is removed, the lenses return to their clear state. This technology allows a single pair of glasses to function as both regular eyeglasses and sunglasses, providing convenience for wearers who move between indoor and outdoor environments.

The darkening and clearing effect is achieved through special photochromic dyes embedded within or coated onto the lens material. These dyes undergo a reversible chemical reaction when exposed to UV radiation. In the presence of UV light, the molecules in the dyes change their structure, causing them to absorb more visible light, which results in the lens appearing darker. When the UV light is no longer present, the molecules revert to their original state, and the lenses become clear again.

The speed at which aurinkosäätölaseja darken and clear can vary depending on the specific product and environmental conditions, such as temperature. Generally, they darken more quickly in colder temperatures and clear more slowly in warmer temperatures. These lenses are available in various prescription types and lens materials, including polycarbonate and high-index plastics, and can be incorporated into different frame styles. They offer protection against UV rays in both their clear and darkened states, making them a practical choice for everyday wear.