Multifocal contact lenses are designed to:

• A. Only correct distance vision
• B. Correct vision at all distances
• C. Correct only near vision
• D. Be worn continuously without correction

Answer: (B)

Multifocal contact lenses are specifically designed to provide vision correction at multiple distances, allowing wearers to see clearly for near, intermediate, and far vision. This feature is particularly beneficial for individuals with presbyopia, a condition that affects the ability to focus on close objects as people age. These lenses incorporate different zones or segments that enable the eye to transition smoothly between these various distances, unlike single vision lenses, which correct for only one distance.

While there are lenses that focus solely on either distance or near vision, multifocal lenses combine these functionalities to meet the needs of dynamic vision in daily activities. Therefore, the correct answer emphasizes the broad corrective capabilities of multifocal lenses.