【JIS Standard 40% Blue Light Cut】 40% cut lenses are suitable for those who use computers for long periods at work, such as desk workers, as well as e-sports players, gamers, and those who use smartphones for extended periods. (A higher number does not necessarily mean better.) 【Frame Design Features】 The rimless frame, which enhances the business scene, gives a smart impression to the face. The square lens cut creates a sharp and crisp dandyism. 【Photochromic Function】 The lens appears almost transparent indoors, with a concentration of approximately 3%. (It has a slight yellow tint when viewed closely due to the blue light cut processing.) It changes color to approximately 30% in bright sunlight when outdoors. This is not a darkness that makes it difficult to see (approximately 60%), but a change to light gray, which is a soft-color sunglasses type that is currently trending and often worn by celebrities. (Also, a common misunderstanding is that they do not change color when driving, but most cars have UV-cut processing on the window glass, so photochromic glasses do not change color. They only change color under outdoor sunlight.) 【UV400 Coating】 UV400 protective coating blocks 99% of harmful UVA & UVB rays, protecting your eyes from UV damage.