Thyroid Disease and Dry Eye

If you have a thyroid condition and your eyes are chronically dry, burning, or visually unstable, the two are almost certainly connected. Thyroid eye disease — and the dry eye that comes with it — is a distinct clinical entity with specific mechanisms and specific treatment requirements.

The Connection Between Thyroid Disease and Dry Eye

Thyroid eye disease (TED), sometimes called Graves ophthalmopathy or thyroid-associated orbitopathy, is the eye involvement that occurs in autoimmune thyroid disease. It most commonly affects patients with Graves disease (hyperthyroidism) but can also occur in Hashimoto thyroiditis (hypothyroidism) and even in patients with normal thyroid hormone levels who have autoimmune thyroid antibodies.

The mechanism involves autoimmune inflammation of the tissues surrounding and behind the eyes, particularly:

• The extraocular muscles that control eye movement
• The orbital fat behind the eyes
• The lacrimal gland
• The eyelid tissues

This inflammation has multiple consequences for the ocular surface — and dry eye is among the most common and persistent.

How Thyroid Disease Causes Dry Eye

Lacrimal Gland Inflammation

The lacrimal glands can be directly affected by the autoimmune process, reducing aqueous tear production. This contributes to aqueous-deficient dry eye in many thyroid patients.

Proptosis (Eye Bulging)

In moderate-to-severe thyroid eye disease, the orbital tissues swell and push the eyes forward. The result is that the eyelids cannot completely cover the eyes during normal blinking — particularly during sleep. Incomplete blink leaves portions of the cornea chronically exposed, accelerating evaporation.

Lid Retraction

Even in mild thyroid eye disease, the eyelids often retract upward, exposing more of the eye surface than normal and increasing evaporative tear loss. Lid retraction also gives the eyes the characteristic “staring” appearance often associated with Graves disease.

Incomplete Blinking

The combination of proptosis, lid retraction, and altered eyelid mechanics produces frequent incomplete blinks — the eyelid does not fully close even during voluntary blinking. Each incomplete blink fails to properly distribute the tear film and release Meibomian gland oil.

Meibomian Gland DysfunctionThyroid eye disease is associated with increased rates of Meibomian Gland Dysfunction, contributing further to the evaporative component of dry eye.

Symptoms of Thyroid-Related Dry Eye

• Persistent dryness, often particularly severe in the morning
• Burning, stinging, or gritty sensation
• Eyes that look prominent or “staring”
• Sensation that the eyes are not closing fully during sleep
• Excessive watering (reflex tearing) paradoxically combined with dryness
• Light sensitivity
• Eye fatigue and pressure sensation
• Double vision (in moderate-to-severe TED)
• Reduced eye movement (in moderate-to-severe TED)
• Eyelid swelling or redness
• Vision changes — usually subtle, sometimes severe in advanced cases

Thyroid Eye Disease Without Active Thyroid Imbalance

An important and often confusing aspect of thyroid eye disease is that it can occur in patients whose thyroid hormone levels are normal — including patients who have never been diagnosed with thyroid disease at the time of eye symptoms. The autoimmune antibodies that drive TED can be active even when thyroid function tests appear normal.

Patients with unexplained chronic dry eye that involves the eyelids, blink mechanics, or eye position should be evaluated for thyroid antibodies even if previous thyroid function tests have been normal.

How We Diagnose Thyroid-Related Dry Eye

At your comprehensive dry eye evaluation, Dr. Kresch evaluates for thyroid eye disease through:

• Detailed symptom and medical history — including known thyroid disease, family history, and any systemic symptoms of thyroid imbalance
• Eyelid position and blink assessment — measuring proptosis, lid retraction, and blink completeness
• Tear film testing — breakup time, osmolarity, Schirmer test
• Meibography — to assess Meibomian gland involvement
• Ocular surface staining — to visualize exposure damage, particularly at the lower cornea where incomplete blinks expose tissue
• Referral for thyroid workup — when TED is suspected and thyroid status is unknown, we coordinate with primary care or endocrinology for thyroid function and antibody testing

How We Treat Thyroid-Related Dry Eye

Aggressive Lubrication

Preservative-free artificial tears used frequently throughout the day are foundational. For patients with significant lid retraction or proptosis, nighttime lubrication with a lubricating gel or ointment helps protect the cornea during sleep.

Anti-Inflammatory Therapy

Prescription anti-inflammatory drops (cyclosporine, lifitegrast) help control the chronic ocular surface inflammation. Short courses of topical corticosteroids during flares can also be helpful.

Moisture-Chamber Goggles or Tape

For patients whose eyelids do not close completely during sleep, moisture-chamber goggles or eyelid taping at bedtime can prevent overnight corneal exposure and the morning dry eye flares that typically accompany it.

In-Office Treatments for Concurrent MGD

When Meibomian Gland Dysfunction is present (which is common), IPL, RF, and LLLT may be appropriate. The combined treatment protocol can produce significant improvement in thyroid-related dry eye that has not responded to standard care.

Scleral Lenses

For severe cases with significant proptosis and chronic exposure, scleral lenses provide continuous corneal protection and hydration that other interventions cannot match.

Coordination with Endocrinology

For active thyroid disease, optimizing thyroid hormone status helps reduce the overall inflammatory drive. Dr. Kresch coordinates with referring endocrinologists.

Treatment of Underlying TED

For active thyroid eye disease, systemic treatments — including teprotumumab (Tepezza), corticosteroids, orbital radiation, and in severe cases surgical decompression — are sometimes appropriate. These are managed by ophthalmologists specializing in oculoplastics or neuro-ophthalmology. Our practice focuses on the ocular surface and dry eye management; we refer for systemic TED treatment when appropriate and coordinate with the managing physician.

Why Continued Monitoring Matters

Thyroid eye disease has periods of active inflammation (typically 6 to 24 months) followed by a chronic stable phase. Dry eye symptoms often persist long after the active inflammatory phase has ended because lid position, blink mechanics, and gland function may not return to normal. Ongoing dry eye management is typically lifelong for patients with established thyroid eye disease.