: 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
The seventh planet feels like something reserved for people with huge telescopes, expensive eyepieces and incredibly lucky atmospheric seeing.
—
Jamie Carter,
Space.com,
3 July 2026
Stand-alone telescope eyepieces with active light amplification do exist for a real-time viewing, but commercial products are pricey, costing hundreds to thousands of dollars.
—
Jordan Blanchard,
IEEE Spectrum,
4 Jan. 2026
Beneath the dome, the 57-foot-long Great Refractor telescope is wrapped in black plastic tarps from eyepiece to lens assembly.
—
Ethan Baron,
Mercury News,
31 Dec. 2025
See All Example Sentences for eyepiece
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Jamie Carter,
Space.com,
3 July 2026
Stand-alone telescope eyepieces with active light amplification do exist for a real-time viewing, but commercial products are pricey, costing hundreds to thousands of dollars.
—
Jordan Blanchard,
IEEE Spectrum,
4 Jan. 2026
Beneath the dome, the 57-foot-long Great Refractor telescope is wrapped in black plastic tarps from eyepiece to lens assembly.
—
Ethan Baron,
Mercury News,
31 Dec. 2025
See All Example Sentences for eyepiece
Cite this Entry
“Eyepiece.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eyepiece. Accessed 7 Jul. 2026.
Copy CitationKids Definition
eyepiece
noun
eye·piece
ˈī-ˌpēs 
: 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
: the lens or combination of lenses at the eye end of an optical instrument
called also ocular
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