Fujita Optical Photochromic Sunglasses with Tinted Lenses that Change Darkness with UV Popular for Men and UV Wellington Boston CL Series Intensity,

Welcome to Select Items Norisuke. We are Japanese seller. We ship authentic items from Japan. Please enjoy shopping with peace of mind! You will find popular and useful products in Japan! [Why and how do photochromic sunglasses change color?] They react only to ultraviolet (UV) light! The lenses contain a special substance that reacts only to the ultraviolet light contained in sunlight, not to visible light. Outdoors (with UV rays) → Color darkens. When exposed to sunlight outdoors, the lenses detect UV rays. A special substance inside the lenses reacts, changing its properties and causing the lenses to become colored. Indoors (no UV rays) → Color fades When you enter a place where there is no UV rays, such as indoors, the special substance returns to its original state. The color of the lens then naturally fades, and your vision returns to near-clear. Frame size: Lens width 50mm / Lens height 43mm / Bridge width 25mm / Temple 140mm [Lens color] Normal: Clear / Photochromic: Light blue [Accessories] Sunglasses case / lens cloth [Important points to know] Are the tints less likely to change inside a car? Many car windshields are made of materials that block ultraviolet (UV) rays. This means that photochromic lenses are less likely to react to UV rays, and may not darken as easily inside a car. This is good evidence that the lenses react primarily to UV rays, not visible light. Effects of temperature The speed and intensity of the tint change are somewhat affected by the temperature. (When it's cold, the tint tends to darken more easily and return to its original color more slowly.) [Here are some of the benefits!] - Automatically adjusts according to UV levels: The lenses intelligently respond to the amount of UV rays in your surroundings, automatically adjusting to the appropriate lens density at all times. - Comfortable, no need to change: No need to go through the hassle of changing sunglasses every time you move indoors or outdoors or when the weather changes. - Always clear vision: Appropriately reduces glare and reduces eye fatigue. Maintains visibility in a variety of lighting conditions. - Of course, UV protection: Regardless of the lens color, UV rays that are harmful to the eyes are effectively blocked. (Please check the UV protection performance of this product.) ※※Please be sure to check. [About lens color] Normally: clear / After photochromic: light color (faint color) *Compared to regular sunglasses, these lenses use photochromic lenses that change to a paler light color. ※※Please be sure to check. [Points to note about photochromic lenses] (1) It takes a few minutes for the photochromic lenses to return to almost colorless. (2) The color of the photochromic lenses does not darken in a car. (3) The color of the photochromic lenses does not darken when the temperature is high. (4) The color of the photochromic lenses will gradually stop changing over time. (5) If they are scratched, the color will no longer change.