EYEHOLE
eyelet, eyehole
(noun) a small hole (usually round and finished around the edges) in cloth or leather for the passage of a cord or hook or bar
peephole, spyhole, eyehole
(noun) a hole (in a door or an oven etc) through which you can peep
Source: WordNet® 3.1
Etymology
Noun
eyehole (plural eyeholes)
The hole to which the viewer places his or her eye in a device such as a telescope.
The hole in a helmet, skull, etc. corresponding to the position of the eye.
Source: Wiktionary
Eye"hole`, n.
Definition: A circular opening to recive a hook, cord, ring, or rope; an
eyelet.
Source: Webster’s Unabridged Dictionary 1913 Edition