Could it possibly be Infectious coryza? Coryza is a respiratory airborne bacterial infection. It's a slow spreading chronic disease that can spread amongst your chickens. S/S to include swelling of the face around the eyes and wattles, nasal discharge and swollen sinuses. Watery discharge from the eyes frequently results in the lids adhering together. Vision may be affected because of the swelling. Wet wings are also a symptom of it. If this is the case you need to separate your chick from the others, do strict cleaning and disinfecting. You can use either Sulfadimethoxine or Sulfathiazole in the feed or water. Erythromycin administered in the drinking water can also reduce the symptoms of the disease.
But I would listen to see what others might be thinking as well before I did anything. Then if an answer can't be found, I would call around to a vet that deals with Aviary issues and go from there. If there is no vet that does this, call your local humane society. They might know of someone to call. This was just one idea of many. Don't be alarmed yet. Best of luck to you.