Perfect after-sales service team. Pls feel free to contact us if you have any questions. Product Features Blue Light Blocking+ Anti Eyestrain Computer reading glasses with blue light blocking, a combination of two anti-blue light technologies, Substrate Absorption andFilm Reflection, block the harmful blue lights more accurately and effectively, provide all-day protection from eye fatigue and glare. UV 400 Blocking Reading glasses for man, 100% UVB and UVA blocking reader lenses, blocking light, diminishing damage from strong sunray, gives you the enjoyment of a clear and comfortable vision. Perfect Craftsmanship Rimless reading glasses, fine electroplating metal frame, unfading. Spring hinge temple, adjustable, applicable for most face types. Fashion Frame Design Computer reading glasses men blue light blocking, rimless rectangular frame design, simple and full of design, suitable for men. Professional and Accurate After multiple and strict tests, professional blue light readers provide you with multiple and accurate glasses degree choices: readers 1.0, 1.25, 1.50, 1.75, 2.00, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75, 4.00 glasses for men, provide you the enjoyment of a clear and comfortable vision. Excellent Wearing Experience 1. Spring hinge, flexible, suitable for different types of faces, and will not pinch your face. 2. Soft adjustable silicone nose pads, longtime wearing without fatigue. 3. The curved plastic temples are ergonomically designed, non-slip, no face clamping.