Which factors can affect lens power?

Lens power is determined by several key factors that influence how the lens refracts light to form images. The correct response mentions curvature, thickness, and index of refraction, which are all critical to understanding and calculating lens power.

Curvature refers to the shape of the lens surfaces. A more pronounced curvature can increase the lens power because it bends light rays more sharply. This is fundamental to how lenses focus light, with steeper curves leading to higher refractive powers.

Thickness also plays a role since changes in thickness can affect where light focuses after passing through the lens. Thicker lenses may have different focal lengths compared to thinner ones, altering their effective power.

The index of refraction is another essential factor since it indicates how much light is bent when entering the lens material. A higher index of refraction means that light will bend more sharply at the boundary between air and the lens material, contributing to the overall power of the lens. The interaction of these three factors allows for precise control over how lenses are designed to correct vision or manipulate light.

In contrast, the other options do not adequately encompass the necessary factors affecting lens power. For instance, curvature alone does not consider how thickness and the refractive index interact with light. Moreover, while color and coating