Which term refers to the exaggeration of distortion at the edge of a mirror?

Spherical aberration refers to the phenomenon where light rays that strike a spherical mirror near its edge do not converge at the same point as those that hit closer to the center. This leads to an exaggeration of distortion at the edge, causing images to appear blurry or distorted, especially when the object being reflected is far away. In optical systems, spherical aberration occurs because a spherical mirror does not focus all incoming light rays equally, which impacts the overall quality of the image produced. Understanding spherical aberration is essential for improving optical design, as it can significantly affect the performance of mirrors and lenses used in various applications.