EYELET

n. I'lezt. Fr., ceillet. A small flanged tube for insertion into an opening for the purpose of preventing it from closing. Politzer's vulcanite e's. Fr., ceillets de vulcanite. Ger., Politzer's che Kautschukosen. Small tubes of vulcanite, 2 to 3 mm. long and 1 mm. wide, which have one or two grooves on their external surface, 'into which the margin of the perforation in the membrana tympani enter. They are introduced into the perforation on the point of a par centeses needle, for the purpose of keeping the perforation open. [F, 3.] EYE-PIECE, n I'pes. See OCULAR. [s. 795]