LINGUISTICS & CULTURE
|Data:||10/JAN/2006 3:13 AM|
Unaided eye is typically used in a contrastive context.
"With a powerful telescope an astronomer can identify seventeen thousand stars in the constellation of Poscium. With a home telescope you can see a few hundred, but with the unaided eye you can only see thirteen!"
The expression applies to any context where you would expect the observer to be using an optical device of some kind.
"With a home microscope you can actually count the hairs on the legs of a flea. With the unaided eye you barely see the legs..."
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