‘眼镜’ (yǎn jìng) literally means ‘eye mirror’—‘眼’ (yǎn) means ‘eye’, and ‘镜’ (jìng) means ‘mirror’ or ‘lens’. Together, they refer to eyeglasses: corrective, protective, or decorative lenses mounted in a frame worn over the eyes. This compound reflects how Chinese often forms concrete nouns by combining two meaningful characters that describe function or appearance.

‘眼镜’ is a neutral, everyday term used across all registers—from doctors prescribing them ('配眼镜') to students forgetting them at home. It covers both prescription glasses and non-corrective types like sunglasses (太阳镜) or reading glasses (老花镜), though those have more specific names. Unlike English, Chinese doesn’t distinguish grammatically between singular and plural—‘一副眼镜’ (a pair of glasses) is the standard measure word phrase, since glasses are treated as a single unit.