Progressive lenses are a type of corrective lenses that provide clear vision at multiple distances. They are designed to help people who have presbyopia, a condition that makes it difficult to see objects up close. Progressive lenses are also known as multifocal lenses or varifocal lenses.
Progressive lenses offer a number of benefits over traditional bifocal or trifocal lenses. First, they provide a wider field of vision, which can be helpful for activities such as driving or playing sports. Second, they are more cosmetically appealing than bifocal or trifocal lenses, as there is no visible line separating the different focal points. Third, progressive lenses are typically more comfortable to wear than bifocal or trifocal lenses.