What does eyeglass mean?
An eyeglass is a single lens, usually framed and either handheld or fitted to rest over one eye, that serves to magnify objects or compensate for defective vision. In everyday usage the word most often appears in its plural form, 'eyeglasses', which denotes a pair of such lenses mounted together in a frame worn across the bridge of the nose — what British speakers more commonly call spectacles. The singular survives chiefly in older texts, historical drama, and technical settings: optometrists speak of individual trial lenses as eyeglasses, and collectors may refer to a jeweler's or watchmaker's single-lens aid by this name. The word carries a slightly formal or old-fashioned flavor compared with the casual 'glasses', and it evokes images of Victorian scholars, jewelers, and early optical instruments. Its meaning is straightforward but its register matters: choosing 'eyeglass' over 'glasses' signals precision, formality, or a deliberate nod to tradition.
A single lens, typically mounted or handheld, used to magnify or assist vision in one eye.
"The inspector raised an eyeglass to scrutinize the signature on the document."
Singular usage is now relatively rare; the plural 'eyeglasses' is the everyday term for spectacles.
Usually plural: a pair of lenses in a frame worn to correct or enhance eyesight.
"She reached for her eyeglasses before reading the fine print."
American English prefers 'eyeglasses'; British English prefers 'spectacles' or simply 'glasses'.
The plural is the standard and far more common form, referring to a pair of lenses worn together; it takes a plural verb ('my eyeglasses are').
"My new eyeglasses arrived yesterday and fit perfectly."
Before contact lenses and laser surgery, people who wanted invisible vision correction wore a single eyeglass — often called a monocle — balanced precariously in one eye socket.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of eyeglass
The word 'eyeglass' is formed transparently from two native English elements: 'eye', deriving from Old English 'ēage', and 'glass', from Old English 'glæs', both of Germanic origin. It emerged in Middle English as a compound describing lenses made of glass intended for the eyes, with the earliest senses relating to single lenses used for viewing or correcting sight. As optics advanced, the compound extended naturally to framed pairs of lenses, giving rise to 'eyeglasses' as the standard American term for spectacles. Related Germanic compounds such as German 'Brillenglas' reflect the same transparent word-formation logic, though they use different roots.
Related word forms
How eyeglass is actually used
In modern American English, the singular form is uncommon except as a component of 'eyeglasses'; British English strongly prefers 'spectacles' or 'glasses'. The singular 'eyeglass' survives mainly in historical or specialist contexts, such as describing an optometrist's trial lens or a loupe-like device.
Easily confused with eyeglass
An eyeglass is a general term for a single lens for viewing or correcting vision, while a monocle is specifically a single lens worn in front of one eye, usually without a handle.
A magnifying glass is a handheld convex lens used to enlarge small objects, whereas an eyeglass is primarily intended to be worn or held directly against the eye.