Symptoms, Warning Signs, and Emergencies

Learning to distinguish between typical symptoms of scleritis and acute danger signs is one of the most important skills you will develop. While scleritis is always serious and requires expert management, recognizing severe changes early can help save your vision.

Action Plan for New or Worsening Symptoms

It is common for scleritis to have “ups and downs.” However, a recurrence of redness or a slight increase in the familiar dull ache—even without any changes to your vision—is not something to ignore or manage on your own. You should contact your ophthalmology team for a same-day assessment to adjust your maintenance medications, as structural damage can occur without vision changes ^[1][1].

Hallmark Symptoms of Scleritis

Scleritis is known for its intense, unmistakable physical sensations. Knowing these symptoms helps you describe your experience accurately to your care team.

• Deep, “Boring” Pain: This is the most common symptom. It is often described as a deep-seated, drilling ache that feels like it is behind or inside the eye globe ^[2].
• Nocturnal Pain: The pain frequently worsens at night and is notorious for waking patients up from a sound sleep ^[3].
• Pain with Eye Movement: Because the muscles that move your eye are attached to the sclera, looking left, right, up, or down can trigger sharp stabs of pain ^[2][4].
• Radiating Pain: The inflammation can irritate surrounding nerves, causing the pain to spread to your temple, jaw, or forehead ^[5].
• Photophobia: A heightened sensitivity to light that makes being in bright rooms or outdoors painful ^[6].

The “Hidden” Scleritis: Posterior Scleritis

Posterior scleritis affects the back of the eye, which cannot be seen by looking in a mirror. Because of its location, your eye might not look very red at all ^[2]. However, you may experience severe pain, a deep headache, and significant vision changes ^[7]. Doctors often use a B-scan ultrasound to look for a “T-sign,” which indicates fluid buildup behind the eye, though this test is integrated with your full exam ^[8].

Red Flags: When to Seek Emergency Care

Certain symptoms indicate that the inflammation is becoming destructive or threatening the structural integrity of your eye. If you experience any of the following, seek urgent same-day ophthalmic assessment immediately. If your specialist is unavailable, go to an emergency eye clinic or an emergency department.

1. Sudden Vision Loss or Distortion

Any sudden blurring, “veils” in your vision, or a loss of peripheral (side) vision is an emergency. This can indicate that the inflammation is causing retinal detachment or fluid buildup behind the retina ^[2][9].

2. Necrotizing Scleritis and “Melting”

Necrotizing scleritis is the most severe and destructive form of the disease ^[10]. In this state, the inflammation cuts off blood flow to the sclera, causing the tissue to die (necrosis).

• The Risk of Globe Perforation: If the sclera thins too much, it can “melt,” creating a risk of perforation (a hole in the eye globe) ^[11][12].
• Signs to watch for: If you see a dark or bluish-gray patch on the white of your eye, it may be the underlying layer (the uvea) showing through the thinned sclera ^[11].

3. Corneal Involvement (PUK)

When inflammation spreads to the cornea (the clear “window” at the front of the eye), it is called Peripheral Ulcerative Keratitis (PUK) ^[13].

• Symptoms: This often feels like a sharp, “foreign body” sensation, as if something is stuck in your eye, combined with increased tearing and severe pain ^[14].
• Why it’s an emergency: PUK can lead to severe corneal thinning and requires urgent evaluation, keeping in mind that infection must be considered before immunosuppression ^[15].

4. Severe Pain with Nausea

If your eye pain becomes so intense that it causes nausea or vomiting, this requires immediate assessment to measure pressure and examine the eye, as it can indicate high intraocular pressure, acute angle-closure glaucoma, or other acute emergencies ^[7][16].