If language does affect colour-perception, then it is more likely to affect perceptions from the right visual field than the left.

ECONOMIST: Psychology

They found that they got the effect whichever visual field they presented the test to, but it was stronger when the presentation was to the right one (ie, to the left-hand, language-processing side of the brain), than to the left one.

ECONOMIST: Psychology

Some people with early AMD (but not all of them) will develop late AMD, in which a person has larger drusen and a blurred area at the center of their visual field.

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As the metal detector sweeps over the mine, the dots grow, creating a visual outline of the mine in the field.

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Others have put forward different ideas for how pigeons find their way, suggesting that the birds use smell, visual clues or the Earth's magnetic field, or even a combination of all of these.

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"The thing I'm envisioning is that visual aids in your field of vision could highlight the lane markings for people who find night driving difficult, " he says.

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"East Kent has always had a strong reputation for cultural excellence, be it in the field of theatre or literature, the visual arts or dance and developments over the last few years have only served to cement that relationship, " he said.

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But audio experts say that the basic principles the CIA uses are likely the same ones that have driven the field of voice recognition since the 1940s: use of a spectrogram, a visual representation of the frequencies of human speech.

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