eyeglass

Thân thiện

A woman adjusts her eyeglass with a thoughtful expression.

Definition

Noun: A single corrective lens, typically for one eye, designed to improve defective vision. It is held in place not by a frame with earpieces, but by the muscles around the eye socket.

Usage

An "eyeglass" is a singular optical device, distinct from a pair of glasses. It is used to correct vision in only one eye, often when the other eye does not require correction or requires a different type of aid.

Examples

• The antique collector found a Victorian eyeglass on a delicate chain.
• After his surgery, he used an eyeglass for reading while his right eye healed.
• A monocle is a type of eyeglass that was once a fashionable accessory.

Advanced Usage

• Historical Context: The term often refers to historical vision aids like the monocle or quizzing glass, which were single lenses held by hand or secured by the eye socket.
• Technical/Medical Context: In optometry, an "eyeglass" can specifically denote a trial lens used during an eye examination to determine the correct prescription.

Variants and Related Words

• Monocle (n): A type of eyeglass for one eye, often associated with formal wear in the past.
• Lorgnette (n): A pair of eyeglasses or opera glasses held by a long handle.
• Spectacles (n): The more common term for a pair of lenses set in a frame for wearing in front of both eyes.

Synonyms

• Monocle
• Single lens
• Corrective lens (when referring to the singular item)

Notes on Meaning

The primary and most specific meaning of "eyeglass" is a lens for one eye. It is crucial not to confuse it with "eyeglasses," which always refers to a pair of lenses. The word is largely historical or technical in modern usage, as single-lens vision correctors are rare today.

Học thuật

Noun

1. lens for correcting defective vision in one eye; held in place by facial muscles

Từ đồng nghĩa

• monocle