Compact D28 version for narrow faces or hats that are often loose. Turtle Caddis Readers - Your chosen magnification across the entire lens allows you to read things up close without squinting or using a magnifying glass. Blue Light Filtering - Offers protection from blue light to reduce eyestrain. Includes an anti-reflective and scratch resistant coating. D28 Compact Fit Frame Width - 136 MMBridge Width - 22 MMLens Height - (does not include frame) - 40 MMLens Width - (does not include frame) - 48 MMTemple Length - 145 MMHinge-to-Hinge Width - 125 MM Lens Power Available in: 0.00 - Zero magnification. Offers protection from blue light & eyestrain.1.50 - As you begin to recognize the need, and eventual addiction, to seeing things clear again, you’ll want to upgrade and have a pair of +1.50 around. 2.00 - More than likely, you’re already a buyer and user of corrective eyewear, so from here on out, you have some idea of what you need.2.50 - Varsity league user. We don’t need to tell you anything that you don’t already know!