naked eye

Idioms  

1. 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.

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Example Sentences

See Examples For:

naked eye

"In the few days we've been here, it's become clear that you can see the effects of climate change with the naked eye."

From Barron's ● Aug. 27, 2026

The sample is checked for tiny amounts of blood that cannot be seen with the naked eye.

From Science Daily ● Aug. 21, 2026

Though not immediately visible to the naked eye, the ranch features a number of infrastructural updates, including automated irrigation and a fire suppression system that runs off an 18,000-gallon tank buried underground.

From MarketWatch ● Aug. 12, 2026

Instead, viewers should use certified eclipse glasses for naked eye viewing, but not while looking through binoculars or a telescope.

From BBC ● Aug. 9, 2026

Try to tell the difference—although be forewarned that it’s not easy with the naked eye.

From "Freakonomics: A Rogue Economist Explores the Hidden Side of Everything" by Steven D. Levitt