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.
This means that eyes should be clear of yellowish discharge and matter on the eyelashes as well as the corners of the eyes. Also, the pink color in the white of the eye should be cleared up. Contagious Pink Eye Treatments. Topical antibiotic ointments or eye drops work to clear up infection in pink eye only if the source is bacterial. In this case, you need up to 24 hours for the eye drops or ointment to start working and for the infected person to no longer be contagious. If the source of the pink eye is viral, then the infection will need to run its course.