3. Allergies
The following causes are not contagious. When allergies are the culprit to pink eye, pollen, make-up, dust, pets, or mold may be involved. Be sure to clean your living spaces and your pets to help out. Some allergies such as pollen and plants are difficult to avoid.
In these cases, you may opt for homeopathic or more traditional medication options to help you get through the day. This type of pink eye is not contagious, so work may continue as usual. If the redness is in one eye and not the other, it is not likely to be attributed to this type.