Progressive like lenses. Precisely corrects almost everyone's close-up and reading vision from .5 to 2.50. Our patent pending lens is designed with a technology that is set at a precise power and decreases in increments over 360 degrees from a circular center, top to bottom and left to right. This technology lets you find your precise correction. They adjust as your vision changes. Lightweight and comfortable, with spring hinges for your customized fit.