naked eye

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the naked eye

Normal vision that has not been enhanced or augmented in any way. Because bacteria are invisible to the naked eye, it was only relatively recently in human history that we even became aware of their existence. The fine print is so tiny, you can barely make it out with the naked eye.
See also: eye, naked

*naked eye

the human eye, unassisted by optics, such as a telescope, microscope, or spectacles. (*Typically: appear to ~; look to ~; see with ~; visible to~.) I can't see the bird's markings with the naked eye. The scientist could see nothing in the liquid with the naked eye, but with the aid of a microscope, she identified the bacteria. That's how it appears to the naked eye.
See also: eye, naked

naked eye

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.
See also: eye, naked
References in classic literature ?
In which Mr Jones receives many friendly visits during his confinement; with some fine touches of the passion of love, scarce visible to the naked eye.
And now his mustache begins to be almost visible to the naked eye, whereupon he immediately takes to brandy-and-sodas and fancies himself a man.
Near Keeling Atoll, in the Indian Ocean, I observed many little masses of confervae a few inches square, consisting of long cylindrical threads of excessive thinness, so as to be barely visible to the naked eye, mingled with other rather larger bodies, finely conical at both ends.
The flare will be visible to the naked eye if one looks up about 50 degrees to the south, Wu said.
THE STARS: The Orion Nebula, hidden within Orion's sword, makes for one of the sky's most arresting deep-space objects visible to the naked eye.
Tribune News Network Doha Residents of Qatar and most other Arab countries will see Saturn and Mars appearing close to the Moon within the next three weeks, making their proximities visible to the naked eye, Qatar Calendar House (QCH) said in a statement on Wednesday.
The astronomical phenomenon will be visible to the naked eye starting at 9:20 PM, the statement added.
Muslims across the globe are preparing to celebrate Eid Al-Fitr, marking the end of a month-long fast for Ramadan, on either June 25 or 26, depending on when the new moon will be visible to the naked eye.
She said those on board the boat were "not visible to the naked eye from the shore" but the website argued the photographs were taken while the boat was anchored around 200m from the shore.
Because the event will happen during a new moon, it will not be a visible to the naked eye, since the illuminated side of the moon will be facing away from the Earth.
The Met Office website stated that the Zil-hajj moon would be visible to the naked eye in Karachi for 40 minutes after sunset today.
Visible to the naked eye, it looks like a fast-moving plane only much higher and traveling thousands of miles an hour faster.
Researcher Dr Krystian Wlodarczyk said: "The holograms are visible to the naked eye and appear as smooth, shiny textures.
Each note issued by RBS incorporates a number of security features, most of which are visible to the naked eye, with a number also being machine readable.
The Whitby and District Astronomical Society supported the nomination for Danby, which now joins Sutton Bank National Park Centre, together with Dalby Forest as official Dark Sky Discovery Sites where the Milky Way can potentially be visible to the naked eye.