Trifocal lenses are a type of multifocal eyewear designed to help individuals see clearly at three different distances: near, intermediate, and far. They feature three distinct optical zones, each tailored for specific vision needs, making them ideal for people with presbyopia, a common age-related condition that affects near vision. The top portion of trifocal lenses is for distance vision, the middle section is for intermediate tasks like computer work, and the bottom part is for close-up activities such as reading. This design allows for a smooth transition between different focal lengths, enhancing overall visual comfort and functionality.