eyepiece

noun

eye·​piece ˈī-ˌpēs How to pronounce eyepiece (audio)
: the lens or combination of lenses at the eye end of an optical instrument

Examples of eyepiece in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The first telescopes increased the size of this opening beyond that of the pupil, allowing far more light to pass through, and used lenses to focus that light onto an eyepiece. — Elijah Tan, Encyclopedia Britannica, 18 Aug. 2026 Begin with your lowest magnification eyepiece‚ typically 25mm on a beginner’s model, for the widest field of view. — Jamie Carter, Space.com, 18 Aug. 2026 The final product looks something like a cross between a low-budget Cyberpunk eyepiece and the disposable 3D glasses used in early-2000s movie theaters. — Mack Degeurin, Popular Science, 6 Aug. 2026 See All Example Sentences for eyepiece

Word History

First Known Use

1729, in the meaning defined above

Time Traveler
The first known use of eyepiece was in 1729

Rhymes for eyepiece

See All Rhymes for eyepiece

Browse Nearby Words

eye-opening
eyepiece
eyepit
See all Nearby Words

Cite this Entry

“Eyepiece.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eyepiece. Accessed 25 Aug. 2026.

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Kids Definition

eyepiece

noun
eye·​piece ˈī-ˌpēs How to pronounce eyepiece (audio)
: the lens or combination of lenses at the eye end of an optical instrument (as a microscope or telescope)

Medical Definition

eyepiece

noun
eye·​piece ˈī-ˌpēs How to pronounce eyepiece (audio)
: the lens or combination of lenses at the eye end of an optical instrument

called also ocular

More from Merriam-Webster on eyepiece

Nglish: Translation of eyepiece for Spanish Speakers

Britannica.com: Encyclopedia article about eyepiece

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