Chromatic Aberration

Chromatic aberration is known by a few other terms including color fringing, purple fringing and even color dispersion.

It’s one of the most common problems photographers experience for several reasons. The issue is caused by how light travels through the lens and refracts by the glass elements inside.

There are two primary forms of chromatic aberration:

Longitudinal (Axial) Chromatic Aberration
It’s the most common form of chromatic aberration and occurs as the different color wavelengths fail to meet at the same point on the sensor.

Lateral (Transverse) Chromatic Aberration.
It occurs as a result of light and colour wavelengths approaching the lens at an angle. The light moves through the lens differently to when Longitudinal Chromatic Aberrations occurs. As a result, the light strikes the focal plane or sensor at different angles.

Difference between Chromatic Aberration and Comatic Aberration (Coma)
https://regulusastro.com/2018/12/27/comatic-aberration-and-chromatic-aberration/