Introduction
With chances of people catching COVID-19 increasing, numerous methods for detecting symptoms have been introduced. Fever is one of the most common symptoms, thus the number of temperature thermal imaging processes have increased vastly.
Many belive thermal cameras do not show accurate results, so what is the point? To debunk this theory, thermal infrared cameras have proved to be remarkably accurate, however, the users must strictly follow the instructions of where, when, and how to measure, along with the obstacles that may appear.
Glasses and Thermal Screening
The temeperature of the skin can be lowered due to various factors such as sweating, being in a cold environment, or even wearing makeup. The temperature can be enhanced if wearing exessive clothing or any face obstructions, including glasses, which should be removed before measuring.
The device must be aimed directly at the person’s face, with the whole face visible, and there must be no hair or glasses obstructing the face and thus interfering with the measurment. The eyes and the forehead are the parts of the face with the highest temperature, so those areas will deliver the most reliable results. The person’s temperature needs to be measured from the eye’s tear duct as it is the best spot to take someone’s inner body temperature.
Conclusion
During the thermal screening process, the face of a person should not be covered with glasses. It is necessary for the infrared thermal device to image the tearduct of the eye, that is why the subject must not wear glasses or any other eye obstructions before screening.
Participants should therefore be asked to remove eyeglasses and hats and instructed to stand facing the camera. Thermal cameras are not perfect, but they can help control the coronavirus pandemic if used correctly.
