what is single vision lenses

Single vision lenses are a type of glasses lens that correct vision for just one distance, either close up or far away. They are the most common type of glasses lens prescribed. In contrast, multifocal lenses, such as progressives or bifocals, correct vision for two or more distances at the same time. Single vision lenses are prescribed for one specific type of vision issue like nearsightedness, astigmatism, or farsightedness. They are designed to help people who require correction of farsightedness, nearsightedness, or astigmatism. Single vision lenses can be customized with a wider variety of coating options. They are generally less expensive than bifocal lenses. People under 40 can also need multifocal lenses for multiple types of vision, but they can opt for either having the multifocal lenses or having two or more pairs of single-vision glasses to correct more than one type of vision.