comatic

He had comatic ideas and headaches and has been very nervous for four or five years.

Current MOA-based focusing optics designs have two consecutive array components in order to reduce comatic aberration.

Thanks to a large compound aspherical element in the front group, and another aspherical element in the rear group, distortion and comatic aberrations at the wide angle setting are eliminated.

In general, a bundle of parallel rays passing through the lens at a fixed distance from the centre of the lens are focused to a ring-shaped image in the focal plane, known as a comatic circle.