Joopin Polarized Perfect for and Outdoor UV400 Wellington and Mountaineering Men's Sunglasses, Driving, Sports, Activities, Protection, Style,

[Photochromic Lenses] The lens color density of photochromic sunglasses automatically changes in response to UV rays. In environments with weak UV rays, such as in an office, indoors, or on cloudy days, the photochromic function weakens and the lens color maintains a light base color. In strong UV rays outdoors, the color tone darkens, allowing you to adapt to different lighting environments without having to change glasses. [Blue Light Protection] These fashion glasses use high-quality blue light blocking lenses with high visible light transmittance and low chromatic aberration. They can effectively block harmful light rays, reduce eye fatigue, protect your eyesight, and improve sleep quality. [Applicable in various situations] PC glasses are suitable for various situations that require prolonged contact with electronic displays, such as working in the office, studying, playing games, watching movies, etc. They can also be used as a fashion accessory when going out. Whether you're working indoors on a computer or outdoors using a smartphone, they provide all-round protection for your eyes. Product Specifications: Frame width: 144mm; Lens width: 53mm; Bridge: 20mm; Temple length: 147mm; Weight: 26.8g. These night vision sunglasses create a mysterious and cool impression, perfect for everyday use, walking, hiking, sports, driving, traveling, biking, mountain climbing, fishing, skiing, and more. [Perfect Gift] The set includes: 1 pair of JOOPIN sunglasses, 1 cloth bag, and 1 eyeglass cleaning cloth. A great gift for yourself, friends, family, or your girlfriend. What are "Blue Light Blocking Glasses"? We live in an age where the use of computers and smartphones is commonplace, regardless of age or gender. To protect your eyes, why not be aware of the effects of blue light on your eyes and try blue light blocking glasses? 2. How to Use Blue Light Blocking Glasses: Blue light is everywhere in our daily lives, not only in PC monitors and smartphones, but also in sunlight. Blue light not only has a negative effect on the eyes, but a certain amount is also necessary to maintain our biological and sleep rhythms. It is beneficial for the eyes to be exposed to blue light from the sun during the day and not to blue light at night. Ideally, blue light blocking glasses should be used when using a computer or smartphone, and a separate pair of glasses for everyday use should be kept separate for different purposes. However, due to the hassle and cost involved, some people may prefer to use only one pair of blue light glasses. In such cases, try removing your blue light blocking glasses between computer tasks and actively absorbing natural blue light into your eyes. Taking breaks also helps prevent eye strain. It's best to remove your blue light-blocking glasses in the morning, when blue light is abundant. Conversely, it's best to actively block blue light at night. When using a computer, smartphone, or tablet, be sure to wear blue light-blocking glasses. If you have the habit of looking at your smartphone without glasses before bed, consider using blue light-blocking glasses or a blue light-blocking film. 3. Is blue light really the cause of eye fatigue and pain? VDT syndrome (technostress), which develops from prolonged use of computer screens, has traditionally been attributed to poor posture, stress, and dry eyes caused by reduced blinking. However, it's now believed that blue light emitted from screens is also a contributing factor. Blue light has a short wavelength and is easily scattered. Flickering and glare make it difficult for the brain to focus. Furthermore, the high energy of light can strain the eye muscles by constricting the pupils, leading to eye fatigue, dry eyes, and stiff shoulders and neck.