The Techie Blue Blocker has nomagnification and is made for you to wear with your contacts or for those who do not need readers. If you need a reader while using your computer, you will want to make sure that you choose the page showing "computer readers". Almost all people use their phone, pad or laptop many hours a day. Blue blocking glasses provide your eyes with relief from the glare and blue rays from these devices. The Techie comes in black, crystal gray and clear. The frame has a spring hinge for a flexible and comfortable fit. Frame Measurements: 5 3/8" x 1 5/8" (temple to temple x height of lens)