This study is investigating whether using artificial tears (methylcellulose) can prevent a condition called nasolacrimal duct obstruction (NLDO) in people receiving radioactive iodine for thyroid cancer. NLDO is when your tear duct gets blocked, which can happen after radioactive iodine treatment. Researchers believe radioactive iodine might get into tears and cause inflammation, leading to blockages. This study will see if using artificial tears helps reduce this problem. You may be able to join if you are 18 or older, have thyroid cancer, and are receiving a high dose (150 mCi or more) of radioactive iodine therapy. The main goal is to see how many people develop NLDO after two years.

Study design

This is an interventional study planning to enroll 100 participants. It is not specified if it is randomized or blinded.

What's involved

Participants will self-administer artificial tears according to a schedule. The trial record does not specify other visits, procedures, or tests.

Compensation

Not stated in the trial record.

Follow-up

Participants will be followed for the incidence of NLDO for two years after radiotherapy.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.