The Uvex FitLogic is the first safety eyewear ever to offer a custom fit for any face. Groundbreaking design and smart engineering combined to create features such as self adjusting browbar for superior comfort. The floating lens design allows for superior protection and ventilation that helps to prevent fogging. Uvex FitLogic Reading Magnifiers These individual bifocal readers are bonded directly into a crystal clear lens and offers increased magnification for reading, inspection, and fine detail work .