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New device to catch drug addicts

Chinese scientists have invented a device that can detect a drug user simply from the way his pupils react to certain rays.
None | By Press Trust of India, Beijing
UPDATED ON APR 04, 2006 01:31 PM IST

Chinese scientists have invented a device that can detect a drug user simply from the way his pupils react to certain rays.

The technology, developed by scientists in south-western Yunnan province, bordering the ill-famed 'Golden Triangle', has proved successful in six pilot projects in local villages, and have passed the assessment of the Ministry of Public Security, the state media reported on Monday.

In the tests, 891 cannabis smokers were mixed with 826 non-drug takers. The device was able to catch 93.94 per cent of the addicts if they smoked the drug the day before the test, and 88.52 per cent of them if they did it six days before.

No non-drug takers were mistaken for smoking the drug in the tests, scientists with the Department of Science and Technology said.

For addicts to opium or its related drugs, lights of certain wavelength and intensity make their pupils expand and contract, they said, adding that the new device can find out "how much a person is addicted to drugs."

The technology is obviously more advanced than similar detection techniques applied by police across the country, and it will be a good help if promoted nationwide, the scientists said.

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