: 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
Key features: 50mm objective lens diameter, four eyepieces, three Barlow lenses, manual yoke mount, free download to astronomy software program.
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Kat Bayly, Space.com, 10 July 2025
That’ll have a much wider aperture than a high-magnification eyepiece.
—Mike Lynch, Twin Cities, 6 July 2025
Roof prism design puts the objective lenses directly in line with the eyepieces, giving you the H-shape common in binoculars these days.
—Scott Gilbertson, Wired News, 25 June 2025
Eye Relief: Eye relief refers to the ideal distance from your eye to the eyepiece glass.
—Scott Gilbertson, Wired News, 25 June 2025
See All Example Sentences for eyepiece
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Kat Bayly, Space.com, 10 July 2025
That’ll have a much wider aperture than a high-magnification eyepiece.
—Mike Lynch, Twin Cities, 6 July 2025
Roof prism design puts the objective lenses directly in line with the eyepieces, giving you the H-shape common in binoculars these days.
—Scott Gilbertson, Wired News, 25 June 2025
Eye Relief: Eye relief refers to the ideal distance from your eye to the eyepiece glass.
—Scott Gilbertson, Wired News, 25 June 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 6 Aug. 2025.
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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