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The infrared thermometer is an electronic instrument that provides a measurement of one's temperatures by means of detecting the intensity of thermal radiation emitted naturally by the skin of the forehead.
All objects emit infrared radiation based on it's temperature. The amount of radiation energy emitted and the distribution of the wavelength are related. An infrared thermometer calculates a measurement by factoring in the distance between the thermometer and the person's forehead, to determine temperature.
Infrared thermometers do not send infrared light, wavelengths, or emit radiation back into any part of the human body, internal and external. Infrared Thermometers do not use lasers and therefore there is no risk to the user’s eyes when using the device. Therefore, infrared thermometers do not pose a risk of harm on humans.