An improved monocular/binocular bridge and helmet mounting device employing same for an optical device are provided. The mounting device herein includes a mount with a bridge attachment for providing multiple options for a monocular or binocular optical device and multiple options for moving the attached optical device to any of multiple stowed positions out of the user's line of sight when the optical device is not in use. The bridge attachment and multiple stow positions also allow the unit to be adapted for a variety of viewing devices.