American Board of Opticianry (ABO) Practice Test 2026 - Free ABO Practice Questions and Study Guide

The geometric center of a lens is the precise point where the horizontal and vertical measurements intersect. In the boxing system used for lens measurement, this point is crucial because it represents the center of the lens’s optical area. It serves as the reference point for prescribing a lens and determining its optical properties.

Understanding this concept is essential for various practical applications, such as proper frame fitting and optimizing visual performance. While other choices may represent different aspects of vision or lens parameters, they do not specifically identify the intersection of the bisecting lines associated with the boxing system. The geometric center is fundamental for accurately assessing lens dimensions and ensuring effective correction of vision.