What does eyesight mean?
Eyesight is the noun denoting the faculty of seeing — the sense of vision regarded as a physical capability of the body. It is an everyday word, common in both British and American English, and it appears most frequently in conversations about health and aging: people speak of good, poor, keen, sharp, or failing eyesight, and of losing or preserving their eyesight over time. The word treats vision as something one possesses rather than simply does, which gives it a slightly more personal and medical flavor than the plainer term "sight". It is uncountable and takes no plural. Closely related terms include "vision" and "visual acuity" in more clinical registers. Its opposite is blindness. Because it sounds almost identical to "insight" — deep understanding — the two are sometimes confused in speech, though their meanings could hardly be more different: one is a property of the eye, the other of the mind.
nounThe faculty or ability of seeing; the sense of vision.
- The ability to see; the sense of vision, especially considered as a physical faculty that can be strong, weak, or deteriorating.
"Years of working in dim light gradually took a toll on her eyesight."
"Regular eye examinations can catch problems before they permanently damage your eyesight."
"Despite his failing eyesight, the old sailor could still read the stars."
Extremely rare and generally not used; "eyesight" is treated as an uncountable noun referring to a single faculty shared across instances by context rather than by pluralization.
"The optometrist had examined hundreds of patients' eyesight over her long career."
Your eyesight and your "insight" sound nearly identical — one comes through your eyes, the other through your mind.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of eyesight
Eyesight is a compound formed within English from the Old English word "ēage" (eye) and "siht" (sight), both of Germanic origin. The compound follows the pattern of other native English formations pairing "eye" with another element, such as "eyewitness" and "eyebrow". Unlike many learned vocabulary terms borrowed from Latin or French, "eyesight" has been part of the ordinary English lexicon for centuries and retains its transparent, literal composition.
How eyesight is actually used
A neutral, everyday noun used in both formal and informal contexts. It most often appears in discussions of health, aging, or deterioration ("failing", "poor", "losing one's eyesight"), though it can also be praised ("sharp", "excellent eyesight"). It is uncountable.
Easily confused with eyesight
"Eyesight" is the physical ability to see, while "insight" is deep understanding or perception of a situation or idea.
"Site" is a location or place; "eyesight" refers to vision and is pronounced identically in many accents.