eyeglass

As a proper noun glass

is .

As a noun eyeglass is

a lens, especially one of a pair.

As a noun eyeglass

is a lens, especially one of a pair.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between eyeglass and binocular

is that eyeglass is a lens, especially one of a pair while binocular is .

As an adjective binocular is

using two eyes or viewpoints; especially, using two eyes or viewpoints to ascertain distance.

As nouns the difference between eyeglass and telescope

is that eyeglass is a lens, especially one of a pair while telescope is a monocular optical instrument possessing magnification for observing distant objects, especially in astronomy.

As a verb telescope is

to extend or contract in the manner of a telescope.

As nouns the difference between eyeglass and glasses

is that eyeglass is a lens, especially one of a pair while glasses is plural of lang=en.

As nouns the difference between spectacles and eyeglass

is that spectacles is plural of lang=en while eyeglass is a lens, especially one of a pair.

As nouns the difference between eyeglass and spectacle

is that eyeglass is a lens, especially one of a pair while spectacle is something exhibited to view; usually, something presented to view as extraordinary, or as unusual and worthy of special notice; a remarkable or noteworthy sight; a show; a pageant.

As nouns the difference between goggle and eyeglass

is that goggle is a wide-eyed stare while eyeglass is a lens, especially one of a pair.

As a verb goggle

is to stare (at something) with wide eyes.