Answer
Spherical aberration is caused by a spherical lens surface. The rays that pass through the outer edges of the lens are not focused to the same place as those that pass through the center of the lens. This causes a fuzzy image.
Work Step by Step
Spherical aberration is caused by a spherical lens surface. The rays that pass through the outer edges of the lens are not focused to the same place as those that pass through the center of the lens. This causes a fuzzy image.