eyepiece

American  

[ahy-pees] / ˈaɪˌpis /

noun

1. the lens or combination of lenses in an optical instrument through which the eye views the image formed by the objective lens or lenses; ocular.

---

eyepiece British  

/ ˈaɪˌpiːs /

noun

1. the lens or combination of lenses in an optical instrument nearest the eye of the observer

---

eyepiece Scientific  

/ ī′pēs′ /

1. The lens or group of lenses closest to the eye in an optical instrument such as a telescope or microscope.

---

Etymology

Origin of eyepiece

First recorded in 1780–90; eye + piece

Example Sentences

See Examples For:

eyepiece

Arkapaw: I’m an operator so I love to have my eyepiece to the camera and Ryan sits right next to me.

From Los Angeles Times ● Jan. 22, 2026

Her children gazed into the eyepiece at strange, eight-legged creatures clambering over the moss.

From New York Times ● Apr. 12, 2024

A magnifying eyepiece, produced by 3D printing, fits cellphone cameras and takes photos of microscope slides; AI image analysis then picks out and identifies pathogens.

From Seattle Times ● Sep. 24, 2023

Those phases are more than just a lovely sight at the eyepiece.

From Scientific American ● Jun. 2, 2023

She peered into the eyepiece, positioned the telescope to look through a windowpane, and began twisting the focus knobs.

From "Fablehaven" by Brandon Mull