Myopia -4.0 / Black Photochromic Lenses / Black Frame / 2-Way Lenses / Clear Lenses Indoors → Sunglasses Outdoors / UV & Blue Light Cut Glasses indoors, sunglasses under UV light outdoors. These are 2-way lenses that change color density depending on the amount of UV light. They function as clear, prescription blue light-cut glasses indoors and as prescription sunglasses outdoors, serving two purposes with a single pair. Perfect for travel and outdoor activities. ☆ If you provide your desired prescription in the comments, I will immediately create a dedicated page for you, so please inquire. --- 0 (Non-prescription) -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5.0 -5.5 -6.0 Prescriptions are also available. ☆ About Photochromic Lenses These lenses change color density depending on the amount of UV light. They turn into colored lenses when exposed to UV light outdoors and return to clear lenses in places without UV light, such as indoors. They serve two purposes: glasses and sunglasses, with a single pair. Photochromic lenses automatically change density based on "UV light amount" and "temperature." The more UV light and the lower the temperature, the darker the color becomes. The color tends to be darker on sunny winter days than on hot summer days. Unisex. They are, of course, suitable for men, but also very cool and stylish for women. They become light sunglasses when there is little UV light and dark sunglasses when there is strong UV light. 100% Blue Light Cut Cuts harmful blue light from LED displays on computers and smartphones, as well as from lighting. Other prescriptions and related items are available from this link ↓↓↓ #MILO Glasses ⭐ The lens color will not change inside a car with UV-cut glass. ⭐ It takes some time for the color to return, so please be careful when entering dark places. Copying text or images violates the terms of service. I will report it to the management immediately. Polarized Sunglasses Myopia Glasses Myopia Lenses Bifocal Reading Glasses Reading Glasses Polarized Lenses Outdoor Camping Glamping Photochromic Sunglasses Driving Glasses Blue Light Cut Sunglasses Bifocals Senior Glasses Women's Men's Driving Zoff Hazuki Loupe