Adjustable-focus eyeglasses are a revolutionary technology for people who have varying vision needs. These types of eyeglasses can adjust the focus of the lenses with just the movement of the wearer's head. There are several different names for this type of eyewear depending on the manufacturer or brand. Some of the synonyms for these glasses include adjustable focus eyewear, dynamic focus glasses, variable focus eyeglasses, and self-adjusting glasses. Regardless of the name, the benefits of adjustable-focus eyeglasses are clear for those who require the flexibility to change their prescription without having to constantly switch between different glasses.