KANASTAL TR90 Blue Light Blocking Sunglasses for UV400 Fashionable Eyewear for Men and Women Glasses, Photochromic, Color-Changing Computers,

Photochromic and Color-Changing Function: KANASTAL photochromic sunglasses automatically adjust color intensity based on UV intensity. In bright sunlight, the lenses turn a light gray. They can block harmful UV rays, making them perfect for rainy, cloudy, and sunny weather. Meanwhile, indoors or in low UV conditions, the lenses become nearly transparent (please note that blue light blocking lenses typically have a slight yellowish tint). UV400 & Blue Light Protection: UV400 lenses effectively block UV rays with wavelengths below 400 nanometers (including UVA and UVB), reducing glare and reflections to effectively protect your eyes from UV rays. They also block harmful light from screens such as smartphones, computers, and TVs. They effectively relieve eye fatigue. These convenient glasses serve two purposes in one. Lightweight design (20g): Made of highly elastic TR90 material, the glasses frame is lightweight and durable, with a flexible fit that naturally adapts to various face shapes. The metal temples and non-slip cushion ear pads ensure comfortable, comfortable wear even all day long. Perfect for a variety of occasions: Combining style and practicality, this neutral style is suitable for both men and women, making it suitable for a wide range of ages. It can be easily coordinated for a variety of occasions, from daily commutes to business meetings to casual gatherings, enhancing the wearer's sense of style. Size: Lens width: 51 mm (width from left to right edge of lens, not including frame); Lens height: 43 mm (height from top to bottom edge of lens, not including frame); Overall width: 141 mm (measured from left to right at the widest part of the frame); Bridge width: 18 mm; Arm length: 143 mm; Weight: Approximately 20 g; Note: Due to manual measurement, there may be an error of 2-3 mm.