Butterfly Ballot is a type of paper ballot in which, the actual voting is done by the central fold of a two-page. It is a pamphlet-like ballot. Its two open pages are like a butterfly's wings; the voting is done where the butterfly's body would be. In this type of punch card ballot, the candidates and issues are displayed on both sides, with a single line of numbered marks to punch which runs down the middle. This design can get confusing, especially for harried voters or voters with poor vision.