American Board of Opticianry (ABO) Practice Test 2026 – The All-in-One Guide to Master the American Board of Opticianry Exam!

Bifocal lenses are specifically designed to assist with reading up close. These lenses have two distinct optical powers: one for distance vision and one for near vision. The section of the lens designated for reading is typically located in the lower part of the lens, allowing the wearer to focus on nearby objects, such as text, while maintaining the ability to see further away through the upper portion.

In contrast, progressive lenses provide a smooth transition between various vision zones for distance, intermediate, and near vision, without the visible lines present in bifocals. While they do help with near vision, their primary feature is the ability to correct vision at multiple distances in a single lens. Distance lenses are specifically crafted to correct vision for faraway objects and do not address close-up reading needs. Toric lenses are designed to correct astigmatism, which affects overall vision, but they are not specifically aimed at facilitating close-up tasks like reading.