My son is hyper thyroid and had a hot nodule on his thyroid. He took the nuclear pill about six weeks ago. He has been having trouble wearing his contacts for the past month. He said he did not tell his eye doctor of his condition when he went to see him. (he is 21 years old). He gave him prednisolone acetate 5 ml and had him use it for 5 or 7 days. Not sure of the exact timeframe. He tried again and still having some problems. He used to sleep in them all the time. He has since stopped that practice.