The term 'fisheye' is a type of LENS that produces an extremely wide-angle view. It is commonly used in photography and cinematography to create a distorted, curved image. The crossword solution for the term 'fisheye' is 'LENS, ' which is a device that focuses or refracts light to form an image. Fisheye lenses are typically used to capture a wide field of view, often with a 180-degree angle of view. They are also used to create a distorted, curved effect, which can be used to create interesting visual effects.