Multifocal lenses are specialized eyeglass lenses designed to correct vision at multiple distances. They typically combine different lens powers, allowing wearers to see clearly for near, intermediate, and far distances without needing to switch glasses. This makes them particularly useful for people with presbyopia, a common age-related condition that affects near vision. These lenses come in various types, including bifocals, which have two distinct viewing areas, and progressive lenses, which offer a smooth transition between different focal points. Multifocal lenses can enhance daily activities like reading, using a computer, and driving, providing convenience and improved visual comfort.