Distance between medial and lateral canthi is more than two standard deviations above the mean for age (objective); or, apparently increased length of the palpebral fissures. The phenotype is Human Phenotype Ontology entry HP_0000637 (Long palpebral fissure). Also known as: Broad opening between the eyelids, Broad palpebral fissure, Long opening between the eyelids, Long palpebral fissures, Wide opening between the eyelids, Wide palpebral fissure, Wide palpebral fissures.