The curved surface of glasses lenses, along with the materials they are made from, cause reflections. In fact, you can lose around 10% of light through reflections on lenses. These reflections can be distracting and appear unattractive. An anti-reflective coating allows for clearer vision by reducing reflections.

Another beneficial lens treatment is an invisible dye that blocks ultraviolet (UV) light. Just as sunscreen keeps the sun's UV rays from harming your skin, UV-protective treatments for eyeglass lenses block those same rays from damaging your eyes.