Applications of Infrared Thermography in Ophthalmology.

Body temperature is one of the key vital signs for determining a disease's severity, as it reflects the thermal energy generated by an individual's metabolism. Since the first study on the relationship between body temperature and diseases by Carl Reinhold August Wunderlich at the end of the 19th century, various forms of thermometers have been developed to measure body temperature. Traditionally, methods for measuring temperature can be invasive, semi-invasive, and non-invasive.