Infrared heat may be a hot new trend in grilling, but this type of heat has been occurring naturally since the dawn of time. In fact, everything with a temperature above absolute zero (which is equal to -459.67 degrees Fahrenheit or -273.15 degrees Celsius) emits at least a little infrared radiation.
For example, bacterial and viral causes of pinkeye are almost always contagious and are spread from person to person. However, pinkeye caused by allergens and chemical irritants is not contagious by person-to-person contact. Pinkeye that is contagious has an incubation period as long as 14 days. However, most doctors do not think that pinkeye becomes contagious to other people until symptoms start to develop.
Is Pink Eye Contagious. Pinkeye is only not contagious after starting drops ONLY if it is BACTERIAL pink eye, not viral which most pink eyes are. Bacterial will have pussy discharge, viral will have clear tearing discharge and sometimes tender lymph nodes under the jaw near the ear.