Dear Bonnie02102,
I would recommend that you seek the care of an eyeMD. It is possible that some chemotherapeutic treatments and/or radiation may affect the surface of your eyes causing them to “run”.
Dr. Feldman
Sandy T. Feldman, M.D., M.S.
ClearView Eye and Laser Medical Center
San Diego, California
It is also possible that you have developed Dry Eye Syndrome. Treatment for breast cancer can often causes this condition because medications which change your hormone balance are used, and hormones are very important for tear production. Dry Eye Syndrome can cause a lot of "reflex tearing" because your eyes dry out and then your tear system works overtime to catch up.
You should see an Eye-MD. If you have not been back to your cataract surgeon, start there. If you have, and he has proposed additional surgery on your tear ducts, get a second opinion first. A test called a dacryocystogram can be helpful to determine precisely how your tear drainage canals are blocked, if they are.