pekin ducks eye is shut

by Sonia
(ATlanta Ga)

please help...our pekin duck has been leaning her head and neck to the left side and her right eye is shut...looks like it is watery and she seems to be doing this a lot. I have thrown her food to her left eye so she can see it better. She is eating and seems normal otherwise ...do you know what is going on ?? is this neurological...? please help ! lucy is about 6 years old.....not sure how old pekins live to....we luv her and what can we do ? will this go away? thank you and look froward to your advice...Sonia Atlanta, Ga