For 10 points, name these distortions in optical images caused by
 limitations of lenses, types of which include chromatic and spherical.
Higher-order examples of these entities are described by Zernike polynomials. Two finite transverse
 ones can be calculated using the Aldis theorem. The magnitude of one of these entities is proportional to
 one over the Abbe number. The five Seidel ones arise from a third-order approximation of the sine function
 in Snell's Law and include a type caused by the inability of a lens to focus parallel light rays to a single
 point, as well as astigmatism and coma. For 10 points, name these distortions in optical images caused by
 limitations of lenses, types of which include chromatic and spherical.
Higher-order examples of these entities are described by Zernike polynomials.
optical {aberrations}