<prompt> Direction of Nasolacrimal Duct isDownward,Backward and MediallyDownward,Backward and LaterallyDownward,Forward and MediallyDownward,Forward and Laterally  <response>: O Nasolacrimal duct opens in anterior pa of inferior meatus. O Direction of nasolacrimal duct is Backwards Inwards,laterally and downwards pneumonic: NLD. It courses anterior to maxillary ostium O Opening of nasolacrimal duct is guarded by Hasners mucosal valve 