A lensometer or lensmeter is used by eye care professionals to verify the prescription in eyeglass lenses. The device can also be used to make sure lenses are mounted correctly within a pair glasses, and is also used during the eyewear making process to orient and mark lenses that have yet to be cut. An auto lensometer or automatic lensmeter offers technology advances to help speed up the process. Additionally, some of today's automatic lensmeters can also check the prescriptions of bifocal/progressive lenses, evaluate contact lenses, and analyze lenses for UV protective properties.