Most of the time, a change in the amount or character of eye discharge is caused by an eye infection
such as conjunctivitis. This is a viral or bacterial infection of the outer lining of the eye. Most people with this infection do report a lot of discharge and sometimes it is so much that they eye is sealed shut in the morning. The only part of your story that is not consistent with conjunctivitis is that you are not reporting any redness, pain, or itching of your eye which are the most common complaints. Another possibility is that you have that you have a sinus infection that is causing some discharge to move up the lacrimal duct to your eyes. Again, this problem usually carries the chief complaint of a very runny nose, and not just eye discharge by itself.
I suggest that you schedule an appointment with your primary care physician
. He or she can examine you eyes, ears, nose, and determine whether you have a low level infection which is causing the eye discharge. If you do, then your doctor
will likely prescribe antibiotic eye drops to make sure that any bacterial infection is being treated. Most likely, this will pass on its own. Good luck.