I would discuss this issue with your eyeMD. RAI does not usually cause blocked tear ducts. Surgery may be needed to create an opening from upper tear drainage into your nose, known as dacryocystrhinotomy [DCR].
Dr. Feldman
Sandy T. Feldman, M.D., M.S.
ClearView Eye and Laser Medical Center
San Diego, California
I have thyroid cancer and had RAI in 2004 and didn't realize the connection with the tear ducts until recently. In 2006 I had surgery on my left tear duct which was completely obstructed. The right one was 90% obstructed which I lived with until last week when I had lacrimal tear duct surgery on this eye. It's unbelievable how many other problems stem from thyroid cancer. I was told the only way to cure clogged tear ducts is with the surgery.