Protect your eyes with clear vision!! Our ProOptics Blue Light Blocking Glasses are stylish yet functional, effectively blocking blue light, UV rays and glare by 99% and relieving eye strain, especially when using digital devices. Made with the high quality Japanese TR90 used in aerospace technology as it has the highest power-to-weight ratio of all metals, is super durable and lightweight, and is always resistant to drop, impact and stepping! Flexible glasses made with optical grade resin lenses, used for high-end prescription, have high resolution and good transmittance. With multifocal automatic progressive lens technology, you no longer need to change glasses for any distance. Perfect for indoor or outdoor wear. 10 times more elastic than steel springs, the TR90 frame combines with comfortable nose pads to provide a universally comfortable yet stable grip on any nose. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.