Sun conures eye has been tearing

by Donna Krupinski
(MO)

My sun conure has one eye that has been tearing a clear liquid which mats down the feathers around the eye. This has been going on for months.
My vet has no idea (other than a tear duck being blocked) and suggested I drive to Chicago to see an experienced Avian vet.
My bird is not sick, has a good appetite and acts fine other than this eye problem.
Can anyone offer advice.
Thank you.