Diplo is a Greek word that means “double.” In Russian, the word “diplo-” is used to denote a diplomatic mission, diploma, diplomat and other related concepts.
In medicine, this word is used as part of complex words denoting various types of diplopia - disorders of binocular vision in which a person sees two images of one object. For example, diplopia occurs with strabismus, cataracts, retinal detachment, and also with certain brain diseases.