Suitable for metal and plastic frames, frameless or half-frame frames, just clip to the frame to complete, easy to install and use. Adjustable design, flip up, flip down, very easy and simple adjustment, soft silicone pads fix the fit to prevent scratching the glasses. Filters blue light and UV rays to enhance contrast and protect eyes, ideal for relieving visual discomfort and fatigue associated with computer use. Perfect for browsing, playing games, watching TV or working under fluorescent lights, not easy to fall off, non-slip, firm, anti-glare and scratch-resistant lenses, UV protection, blue light protection. Made of blue light blocking lenses, protect your eyes from harmful blue light and eyestrain. Designed for people who use electronic devices such as computers, TVs or phones.