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Are infrared thermometers harmful to the eyes?

The use of infrared thermometers could cause damage to the eyes and body.

chinadaily.com.cn | Updated: 2020-02-29 07:45
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A staff member measures the temperatures of people entering Ping'an International Financial Center in Shenzhen, South China's Guangdong province, on Feb 10, 2020. [Photo/Xinhua]

Rumor: The use of infrared thermometers could cause damage to the eyes and body.

Fact:

Infrared thermometers work by receiving the thermal radiation emitted by humans, not vice versa. Using infrared thermometers is not harmful to the eyes and body, according to Feng Luzhao, a researcher from the Chinese Center for Disease Control and Prevention.
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