a17 【Important Notes】 Photochromic lenses change color depending on the intensity of ultraviolet (UV) light from sunlight. Please be aware that the color change will be weaker in environments with weak UV light, such as indoors, inside buildings, or on cloudy days. 【For Clearer Vision】 Photochromic lenses automatically adjust their tint according to the strength of UV light, providing optimal vision. They easily adapt to complex weather conditions, offering clear and comfortable vision by effectively cutting glare from the sun, roads, water surfaces, and snow surfaces, regardless of whether it's sunny, rainy, snowy, or cloudy. This is especially helpful for driving and fishing. 【Fast Tinting】 Photochromic lenses change color depending on the intensity of UV light from sunlight. On sunny days, the lenses darken due to strong UV light, effectively protecting our eyes from the sun's intense glare. On cloudy days, the lenses become slightly lighter, ensuring brightness in the field of vision and preventing accidents. 【Minimizing Visual Fatigue】 The lens tint changes depending on the amount of UV light. Even on cloudy days, the lenses will darken if the UV light is strong. This helps prevent eye strain and reduces the appearance of spots and wrinkles around the eyes. They can adapt to all weather conditions and can be worn at night.