Swiss cheese is any variety of cheese that resembles emmental cheese, a yellow, medium-hard cheese that originated in the area around emmental, switzerland. it is classified as a swiss-type or alpine cheese. some types of swiss cheese have a distinctive appearance, as the blocks or rounds of the cheese are riddled with holes known as "eyes". swiss cheese without eyes is known as "blind".swiss cheese is now manufactured in many countries, including the united states, finland, estonia, and ireland. it is sometimes made with pasteurized or part-skim milk, unlike the original from switzerland made with raw milk. the united states department of agriculture uses the terms swiss cheese and emme...

Source: Wikipedia