A point of convergence, such as the point at which rays of light converge in an optical system, or from which they diverge; also called focal point. The clarity of an image, such as when rendered by an optical system; or to make an image clear. The typical camera has a focus ring around its lens.(pr. FOH-kəs)Also see definition, focal length, focal plane, gestalt, obsession, photography, refraction, and soft focus.