Function: Helps to reduce the eye strain that can be caused from computer and phone screens. Office: Ideal for students or office workers who spend a lot of time at the computer! Portable: Compact enough to pop in your bag just in case! Colours: You will receive four different colours - Black, transparent pink, transparent blue, and transparent. Glasses: Get a set of four blue light blocking glasses. Size: Width including frame 14.2cm. 4 Blue Light Blocking Glasses | Living Social | Living Social