Interpupillary distance less than 2 SD below the mean (alternatively, the appearance of an decreased interpupillary distance or closely spaced eyes). The phenotype is Hypotelorism (HP_0000601). Also known as: Abnormally close eyes, Closely spaced eyes, Decreased distance between eye sockets, Decreased distance between eyes, Decreased interpupillary distance, Decreased orbital separation, Ocular hypotelorism.