Visor

Noun

 * 1) A part of a helmet, arranged so as to lift or open, and so show the face. The openings for seeing and breathing are generally in it.
 * 2) A mask used to disfigure or disguise.
 * 3) The fore piece of a cap, projecting over, and protecting the eyes.

Thesaurus
bill, camouflage, dark glasses, disguise, domino, eyeshade, eyeshield, false colors, false face, false front, goggles, incognito, mask, masque, masquerade, mummery, peak, protective coloration, shades, smoke screen, smoked glasses, sunglasses, vizard, vizard mask