Reading Lenses are also commonly referred to as single vision lenses, they only have one dioptric power throughout the entire lens. Often they are used to correct poor eye-site when reading newspapers or books. Reading Lenses are made by tailoring single vision lenses to the wearer’s individual reading distance, which is generally between 30 and 40 cm. As well as making life easier for people who enjoy curling up with a book, they can also be used to read the small text sizes often found on smart phones and tablets. Specially adjusted to each wearer’s visual habits and typical reading distance, they restore people’s ability to enjoy relaxed, fatigue-free vision at close distances – whatever their prescription.