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.

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eyepiece British  

/ ˈaɪˌpiːs /

noun

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

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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.

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Etymology

Origin of eyepiece

First recorded in 1780–90; eye + piece

Example Sentences

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

I go behind the telescope, peer into the eyepiece, and all the stars crash down on my head.

From "I'll Give You the Sun" by Jandy Nelson