lens

C1 · Advanced Countable noun Anatomy Technical

n. the clear part inside your eye that helps you focus on what you are looking at.

n. the transparent, biconvex structure behind the iris that changes shape to focus light onto the retina.

“As people get older, the lens in the eye can become less flexible.”

“Cataract surgery involves the removal of the clouded natural lens and the insertion of a clear artificial substitute.”

C1 · Advanced Countable noun Academic

n. a particular way of seeing or thinking about a situation.

n. a figurative perspective or conceptual framework through which a subject is analysed or perceived.

“We should look at this problem through the lens of social justice.”

“The historian examined the industrial revolution through the lens of environmental impact rather than purely economic growth.”

C2 · Proficiency Countable noun Computing Technical

n. a tool in some computer languages used to look at or change data inside a complex structure.

n. a functional programming construct used to access and update nested data structures in a composable way.

“The developer used a lens to update the user's address deep inside the database object.”

“By using lenses, the programmer could modify deeply nested state properties without manually destructuring the entire immutable object tree.”

C2 · Proficiency Theater Technical

v. to record or shoot a movie.

v. to film or photograph a motion picture or scene.

“The director decided to lens the entire movie in black and white.”

“The production was lensed on location in Iceland to take advantage of the unique natural light and dramatic landscapes.”