Unless this drainage from your dog's eyes is a result of some type of infection, you are most likely dealing with a fairly common problem seen in dogs with light-colored hair.
If the drainage is pus-colored (yellowish-green) or if there is a lot of redness to the "whites" of the eyes, you should have your dog examined by your veterinarian in order to establish a cause and possible treatment.
However, if the drainage is more watery and is mainly staining the hair below each eye, you are more likely seeing the chronic result of what the tears can do to light-colored hair. I covered this topic in a past issue of my blog and you can read it at: www.questionsondogsandcats.blogspot.com/search/label/facial hair staining
There several products available over-the-counter for this staining and I provided a reference to one of them in my blog article.
NOTICE: The information provided on this site is not a substitute for professional medical advice,
diagnosis, or treatment. Never delay or disregard seeking professional medical advice from your
physician or other qualified health provider because of something you have read on Wellsphere.
If you have a medical emergency, call your doctor or 911 immediately.