American Board of Opticianry (ABO) Practice Test 2025 - Free ABO Practice Questions and Study Guide

The correct answer is the term that identifies the specific part of a multifocal lens where the additional power, referred to as the "add," is marked or etched. When considering multifocal lenses, such as bifocals or progressives, the add power is crucial as it allows for near vision correction.

This area is typically found on the ocular (front) side of the lens and is specifically designed to assist the wearer with close-up tasks, such as reading or other near-vision activities. Knowing the location of the add power is essential for both fitting the lenses correctly and ensuring that the patient can transition comfortably between different visual zones.

Recognizing this term helps in understanding the lens design and its purpose, as it directly relates to how effectively a multifocal lens can meet the visual needs of the wearer.