What is a common feature of a multifocal contact lens?

A multifocal contact lens is specifically designed to correct vision at multiple distances, making them effective for individuals who have presbyopia, a condition that affects the ability to focus on close objects as people age. The design of these lenses incorporates different optical zones, allowing the wearer to see clearly both up close and at a distance without the need to switch between multiple pairs of glasses or contact lenses.

This feature is essential for providing a seamless vision correction experience for patients who require support for both near and distance vision tasks, thus making the multifocal lens an effective solution for their visual needs. While it's true that multifocal lenses may have variations in thickness, cost more than single vision lenses, and may require periodic replacement, the key characteristic that defines them is their ability to address both near and distance vision simultaneously.