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

Increasing plus powers in lenses typically lead to an increase in the steepness of the base curves selected for the lenses. This relationship stems from the optical principles governing the design and function of convex lenses. As plus power increases, the curvature of the lens also must increase to properly converge light rays and focus them on the retina.

The steepness of the base curve directly corresponds to how much light the lens can bend; therefore, with higher plus powers, a steeper curve is necessary to achieve the desired optical effect for patients with hyperopia (farsightedness). A steeper base curve ensures that the lens can adequately facilitate the necessary convergence of light.

Understanding this relationship is crucial for lens designers and opticians when prescribing lenses to ensure proper fit and vision correction. It is also important to note that base curve adjustments can affect the lens thickness, weight, and overall aesthetics of the eyewear, factors that are also essential in patient satisfaction.