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naked eye

Idioms

Sight unassisted by an instrument such as a microscope or telescope. For example, These insects are too small to be seen with the naked eye. This expression was first recorded in 1664.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Only then can one attain a view like this and perhaps, with a naked eye, see mountains as they see each other.

From The Wall Street Journal • Jun. 1, 2026

"They are extremely colorful and can be spotted on coral reef ecosystems. However, many nudibranchs are very small in size and are extremely difficult to spot underwater with the naked eye."

From Science Daily • May 27, 2026

To the naked eye, they may have looked similar.

From Salon • Apr. 17, 2026

Grimes said it was almost impossible to see a micrometeorite with the naked eye.

From BBC • Apr. 4, 2026

“That’s not a challenge. Those old video systems emit faint ion beams. Invisible to the naked eye, of course, but not with your iris-cam...”

From "Artemis Fowl" by Eoin Colfer

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.