[OTC.web] 9506KCH Photochromic Sunglasses with UV Protection, Darkens Even in a Car, Large Size, Stylish, Cool, UV Protection, TR90 (C-1 Black, Dark

Photochromic lenses change color in response to ultraviolet and visible light. These lenses are almost colorless indoors, but change color when exposed to sunlight outdoors. Regardless of the degree of color change, they block almost 100% of ultraviolet rays. This visible light photochromic lens type reacts not only to ultraviolet light but also to visible light, so it will color even inside a car with UV protection. Furthermore, considering eye health, it blocks almost all ultraviolet rays, which are said to be one of the causes of cataracts. It also reduces eye strain caused by the glare of the sun. These are stylish and eye-health-conscious lenses. These are stylish and cool color-changing sunglasses in a large size for men. The temple ends are made of rubber for improved comfort and fit. Inside a car, the color will be moderate (approximately 40-50% tint) *It will not become completely dark. Car windshields have UV protection. Because regular photochromic lenses change color in response to ultraviolet light, their effect inside a car could not be expected. HOYA Senscity Dark lenses react to visible light, so they can be used even inside a car. Outdoors, they have a dark color (80-90% density). While regular photochromic lenses are easily affected by temperature changes and do not darken as easily in high temperatures, visible light photochromic lenses have a much higher color density than regular photochromic lenses and perform well even in high-temperature environments. A lens cleaning cloth and folding case are included as a service. Lens size: Width approx. 56mm, Height approx. 32mm, Bridge width approx. 16mm, Temple approx. 140mm, Overall width approx. 145mm, Frame weight 15g. The frame is made of medical-grade resin material, making it flexible, lightweight, and durable. Assembly is done in Japan. Temple size indicated: 56□16-140 Color characteristics: Type of light that reacts: Reacts not only to ultraviolet light but also to visible light. Therefore, the lens color will change even inside a car with UV protection. *They will not darken completely. Color Development Speed: After reacting to ultraviolet light, the color darkens within approximately 90 seconds, quickly becoming like sunglasses. Fading Speed: The fading speed has also been improved, and the color fades about twice as fast as conventional lenses. Factors Affecting Density: Amount of UV Light: The more UV light there is, the darker the color tends to develop. Temperature: The lower the temperature, the darker the color will be, and fading may also take longer. For example, the color tends to darken more easily in winter than in summer. Density Inside a Car: Inside a car, the lenses will be tinted to a moderate level depending on the lighting conditions, but will not reach full density. This is also affected by the material of the windshield, whether the windows are open or closed, and the position of the seat.