eyehole

As nouns the difference between eyelet and eyehole

is that eyelet is an object that consists of a rim and small hole or perforation to receive a cord or fastener, as in garments, sails, etc an eyelet may reinforce a hole while eyehole is the hole to which the viewer places his or her eye in a device such as a telescope.

As nouns the difference between eyehole and celatone

is that eyehole is the hole to which the viewer places his or her eye in a device such as a telescope while celatone is a device invented by galileo galilei to observe jupiter's moons with the purpose of finding longitude on earth it took the form of a piece of headgear with a telescope taking the place of an eyehole.

As nouns the difference between telescope and eyehole

is that telescope is a monocular optical instrument possessing magnification for observing distant objects, especially in astronomy while eyehole is the hole to which the viewer places his or her eye in a device such as a telescope.

As a verb telescope

is to extend or contract in the manner of a telescope.