The graphical features of musical scores that when performed are unnoticeable by the listener.

(dated, rare) cataract of the eye

(nautical) A loop in a hemp cable made around a thimble and served.

(idiomatic) Immediately; instantaneously. / 2007 April 28, Hugh Muir, The Guardian:

(chiefly US) An optometrist or ophthalmologist.

(idiomatic) An event or achievement which is unpleasant for someone, especially for those who considered it impossible or unwelcome; an annoyance.

A chatoyant gemstone that is usually yellow- to red-brown, with a silky lustre.

plural of eye drop

(normally used with definite article) A powerful source of unwanted scrutiny.

plural of eye agate