Downslanted palpebral fissures (HP_0000494) can be described as follows. The palpebral fissure inclination is more than two standard deviations below the mean. Also known as: Antimongoloid eye slant, Antimongoloid slant of palpebral fissures, Antimongoloid slanted palpebral fissures, Down slanting palpebral fissures, Down-slanted palpebral fissures, Down-slanting palpebral fissure, Down-slanting palpebral fissures, Downslanting palpebral fissure.