What is the main difference between single vision and multifocal lenses?

The main difference between single vision and multifocal lenses lies in their intended use for correcting vision. Single vision lenses are designed to correct a single field of vision, meaning they provide a uniform prescription throughout the entire lens. These lenses are typically used for tasks that require either distance vision or near vision but not both at the same time.

In contrast, multifocal lenses are specifically crafted to provide correction for multiple fields of vision, accommodating the needs for both distance and near sight in a single lens. This allows the wearer to see clearly at various distances without needing to switch between different pairs of glasses. Multifocal lenses include progressive lenses, bifocals, and trifocals, each of which integrates different prescription strengths to assist with vision at different ranges.

The other options do not correctly outline the primary distinction between these two types of lenses. While it’s true that multifocal lenses can be more expensive due to their complexity, price is not a defining difference in their function. The suggestion that multifocal lenses offer a wider field of vision is misleading, as they create areas of different prescriptions rather than a uniformly wider field. Finally, single vision lenses can certainly be suitable for computer use, while multifocal lenses can also be utilized for this purpose, depending on the