Imported Polycarbonate frame Polycarbonate lens Non Polarized Lens width: 52 millimeters Bridge: 19 millimeters Arm: 147 millimeters 【Protect Your Eyes】Exposure to blue light for long periods of time can lead to headaches, dry eyes and blurred vision, etc. BOSSWIN blue light glasses help to block out the harmful blue light emitted from everyday devices such as computers/telephones/TV screens. They minimise the amount of harmful light coming into your eyes and take care of your health. 【Improved Sleep Quality】Are you still suffering from insomnia due to reduced production of melatonin (the sleep hormone) caused by prolonged exposure to blue light? Our high-quality Bosswin blue light blocking glasses allow you to enjoy a quieter and deeper sleep by blocking harmful blue light and promoting melatonin production. 【Upgraded Materials】 The frames of our new generation of anti-blue light glasses are made of lightweight and impact resistant PC material to minimise pressure on the ears and bridge of the nose. With an ergonomic and stylish rounded half-frame design, available in two colours, you can easily be the centre of attention whatever the occasion. 【Anti-blue Light Lenses】with clear UV400 anti-blue light coated lenses that filter out a maximum of 99% of harmful blue light, not only will they not alter your colour perception, but they guarantee high definition vision with less colour distortion. The original non-prescription lenses can be replaced with your other lenses at any optician. 【Why Choose us】We are committed to providing high quality products and excellent service to our customers, putting them first. You don't have to take any chances, just enjoy your good time. If you have any questions, please feel free to contact us, we are always here. Show more