Pre-distorted and special charts for Fisheye Lenses | Imatest
Tailored Distortion®: Distortion Correction at the Speed of Light – Sunex Inc.
A different photographic lens might have a distortion of a different type & strength. But a straight line will always appear straight if it crosses the center of the frame. Rectilinear, Barrel
Use of Fisheye Lens for Playful Images - [Canon Hongkong Company Limited]