My eyes were like that also. Sometimes when I would wake up I did not know if they would ever open! I had an eye exam but the doctor said she did not know what would cause this. It finally went away...
I was on 60 mg in April, then the prednisone was lowered every few weeks. I got down to 5mg but the headaches came back. So now I am back up to 40 mg with a new doctor. I think the dosage was lowered...