Abstract: A method of identifying image shift comprises identifying a position of a reference element in a captured image, comparing the identified position with a predetermined expected position, and identifying image shift if the compared positions do not match.

Abstract: Eyewear, e.g., an apparatus to be worn on or adjacent to a person's eyes, which includes a heating element that is configured to provide heat. The heat provided may be sufficient to provide warmth to a wearer of the eyewear or to prevent accumulation of, e.g., snow, ice, fog or any other type of matter, whether environmental or otherwise. The eyewear may include an actuation element for actuating the heating element, the actuation element being configured to cause the heating element to generate heat either automatically or manually. Power for the heating element to generate heat may be provided by a power source, such as a battery.