A Fresnel lens has optical power without overall curvature, so the lens and FOV can be quite large. It’s basically a conventional lens that has been segmented into rings and compressed to make it as thin as possible. As you can see in the Wikipedia graphic below, the local curvature is preserved, while the thickness is reduced significantly.
Fresnel lenses are often used to either focus or collimate light in illumination systems. For example, a Fresnel lens can be used to condense sunlight onto a relatively small solar cell or to illuminate a spatial modulator in a projection system with light from a relatively small source.
The use of Fresnel lenses in imaging applications is less common, because better resolution and contrast can be achieved with conventional optics. Fresnel lenses are limited to imaging applications that require lightweight, thin optics, such as camera viewfinders and virtual reality goggles.