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
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

*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
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

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
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
The results clearly show that there is a large difference between the different samples with some displaying visible colour alterations within their spectrums.
Using gender (2 groups) and visible minority status (9 groups), eighteen groups were constructed for comparison.
"The Visible Crew vehicle can now be seen daily working around the Vale, tackling environmental issues that the council wouldn't be able to undertake within its normal service provision."
Most so-called spectrally selective films transmit no more than 58% of visible light.
One major change relevant to persons with visible disabilities emerged from controlled experiments on an individual's perceived rate of progress relative to the perceived discrepancy size.
McCarron argues that like most of Golding's later fiction Darkness Visible is concerned with the irrational, numinous force which is at the centre of life and which can be apprehended as much by piety as by outrage (51).
"Far too many visible minorities are familiar with the 'glass ceiling,' an invisible plateau that limits their advancement," said Senator Oliver.
Imaging scientists immediately recognized the value of this type of fluorescent material: for every 100 units of x-ray radiation, the old blue screens emit five units of visible light, while the new materials emit 18 units of visible light (Fig.
In most firms, what is visible is what has to be reported in the firm's statutory or GAAP--Generally Accepted Accounting Principles--financials.
It has been shown that labour market participation among immigrant youth, especially those who are members of a visible minority, has been lower than the Canadian-born.
Energy waves are all around you, although the only type humans can see is visible light--as colors from red to violet.
Visible Genetics' TRUGENE(TM) HIV-1 Genotyping Kit and OpenGene(TM) DNA Sequencing System were cleared for marketing in September 2001 by the U.S.
Tarryton, NY and Toronto, Canada 7/23/02--Bayer Diagnostics has signed a definitive agreement to acquire Visible Genetics for $61.4 million.
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