4 PK Mens Rectangular Rimless Blue Light Blocking Reading Glasses Unisex Readers [Anti Blue Light Glasses] Blue light blocker & UV400 Lenses, Alleviates visual fatigue and discomfort from browsing mobile phones, tablets, gaming and working under fluorescent lights with UVA/UVB protection and glare reduction. [Explosion Proof Polycarbonate Lens] Reduce eyestrain, anti blue ray to a great extent; Enjoy your digital time, NO worry about eye fatigue, blurred vision and headache, let you have a better sleep. [Resin Spring Hinge Frame] Ultra-light and flexible resin frame material for durability and comfortable long-term wearing; Casual frame design keeps you looking professional and stylish while working or playing video games. [Worry-Free Shopping] No risk to try, any broken problem happens, just contact the seller without any hesitation to solve the problem until you are satisfied. Quantity: 4 pairs reading glasses. Available strength : 1.00 , 1.50 , 2.00 , 2.50 , 3.00 , 3.50 , 4.00 . Size: 144mm arm length, 140mm frame width, 50mm lens width, 31mm lens height, 20mm bridge. Lightweight blue light blocking rimless readers.