I had "dry eye" before starting Iodine supps, and it disappeared within a couple of months of Iodine supping. I also treat any conjunctivitis, or other eye infections with a dilute Iodine solution, bathing the eye with it several times a day.
I was taking LugolsIodine for about 2 months when the dry eye problem went. At the time I was taking 100mg per day for treating FBD, (also gone now). My eyesight also improved when I started Iodine supping.