Diplopia, commonly known as double vision, is the simultaneous perception of two images of a single object that may be displaced horizontally, vertically, diagonally (i.e., both vertically and horizontally), or rotationally in relation to each other.
Diplopi, kendt som dobbeltsyn, er en simultan opfattelse af to billede af et enkelt objekt, der kan være forskudt horisontalt, vertikalt, diagonalt (altså både vertikalt og horisontalt) eller rotationelt i forhold til hinanden..