For thyroid health and dry eyes, cyclosporine drops outperformed lubricants

If thyroid health problems have left your eyes dry, gritty or burning, there is something specific to ask your eye doctor about. In a study of 86 people, cyclosporine eye drops relieved dry eye from thyroid eye disease better than regular lubricating drops.

People on cyclosporine felt better on a standard symptom questionnaire. Their tears lasted longer on the eye, they made more tears, and the surface of their eyes looked healthier. Some of those gains showed up after just one month.

How the study worked

Researchers followed 86 adults who had dry eye caused by thyroid eye disease. They split them into two groups of 43. One group used 0.05% cyclosporine A drops twice a day. The other group used polyethylene glycol lubricating drops four times a day. Eye exams happened before treatment and again at 1, 2 and 3 months. The study was published Oct. 7, 2026, in Frontiers in Medicine. It was a prospective cohort study, not a randomized trial, and it ran for 3 months.

What they found

After 3 months, the cyclosporine group came out ahead of the lubricant group on four measures:

• Symptoms. Their scores on the ocular surface disease index, a standard dry eye questionnaire, were better.
• Tear stability. Tears stayed spread over the eye for longer before breaking up, measured by fluorescein tear breakup time.
• Tear production. A thin paper strip placed under the lower lid, called the Schirmer I test, showed more tears.
• Surface health. Dye staining showed less damage on the cornea, the clear front window of the eye.

The gap between the two groups was already there at month 1. Both groups improved to a similar degree in the height of the tear pool along the lid and in eye redness. Side effects were low in both groups, and every one of them was mild.

So with 43 people on each treatment, the drops that calm inflammation did more for comfort and for the eye’s surface than drops that only add moisture.

What is thyroid eye disease?

Thyroid eye disease is also called thyroid-associated ophthalmopathy. It is an autoimmune condition most often linked to an overactive thyroid. It can make the eyes bulge, turn red and feel irritated. Dry eye is a common part of it.

Untreated dry eye can damage the surface of the eye and make your vision less sharp. That is why finding drops that work well matters. Lubricating drops add moisture. Cyclosporine works on the inflammation on the eye’s surface, which is a different job.

What you can do today

For the next few days, keep a quick note on your phone about your eyes. Write down when they feel dry, gritty or burning and what you were doing. Then bring that note to your next eye appointment and ask your eye doctor whether cyclosporine drops, such as the 0.05% kind used in this study, could work for you. Your pharmacist can also answer questions about how eye drops are used once your doctor has prescribed them.