Vernal Keratoconjunctivitis: Causes, Symptoms, and Eye Care
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Vernal keratoconjunctivitis (VKC) is an allergic inflammation of the cornea and conjunctiva that mainly affects children and young adults, especially in spring and summer. It causes red, itchy eyes, light sensitivity and small, hard bumps under the eyelids called eye cobblestones [1]. The symptoms can be frustrating, but VKC is treatable with artificial tears, medicated drops, cool compresses and trigger avoidance, and most children stop having symptoms after puberty [1].
Quick Answer
Vernal keratoconjunctivitis (VKC) is allergic inflammation of the cornea and conjunctiva, usually triggered by airborne allergens such as pollen [1]. It typically affects children and young adults, more often males [1]. Symptoms include red, itchy, burning eyes and light sensitivity. Treatment combines medicated drops, cool compresses and avoiding triggers, and most children stop having symptoms after puberty [1].
What the research says
Mast cell stabilizers, cyclosporine and tacrolimus all improve VKC. A meta-analysis of 45 studies (1,749 patients, 78% male, mean age 11.2 years) found that clinical scores improved overall, with total symptom and sign scores falling for mast cell stabilizers (effect size -3.19, 95% CI -4.26 to -2.13), cyclosporine (-2.06, 95% CI -2.72 to -1.40) and tacrolimus (-2.39, 95% CI -3.36 to -1.43), and no significant differences between treatment classes (Roumeau et al., J Allergy Clin Immunol, 2021) [2].
Topical immunomodulators help severe allergic eye disease. A meta-analysis of 13 randomized trials (445 participants, mean age 14 years) of topical cyclosporine or tacrolimus in vernal and atopic keratoconjunctivitis found improved clinical signs such as conjunctival redness and papillae (pooled standardized mean difference -0.98, 95% CI -1.26 to -0.69) (Erdinest et al., Int Ophthalmol, 2024) [3].
Corneal complications can need surgery when drops are not enough. A review of VKC's corneal sequelae (giant papillae, shield ulcers, limbal stem cell deficiency and keratoconus) reported that surgery may be needed when medical therapy is inadequate, and that keratoconus linked to VKC is often severe and rapidly progressive (Sharma et al., Semin Ophthalmol, 2026) [4].
What Is Vernal Keratoconjunctivitis?
Vernal keratoconjunctivitis (VKC) is allergic inflammation that affects two parts of the eye at the same time. The cornea is the clear, dome-shaped cover on the eye, and the conjunctiva is the clear membrane that covers the inside of the eyelid and the white part of the eye. VKC happens when allergens in the air get into the eye and irritate both [1].
Keratoconjunctivitis is similar to pink eye, but it irritates the cornea and conjunctiva together. The word vernal is Latin for springtime, which is where the condition gets its name: it affects children in spring and summer, when there are lots of allergens in the air [1]. VKC usually affects children and young adults, and many children grow out of it after puberty [1].
Recognizing the Symptoms
VKC symptoms usually happen in both eyes at the same time [1].
Symptom Category | Common Signs |
Visual Appearance | Red eyes, swollen eyelids, and watery eyes or eye discharge. [1] |
Physical Sensation | Itchy or burning eyes and a feeling that something is stuck under the eyelid. [1] |
Visual Changes | Blurry vision and sensitivity to light. [1] |
Eyelid Features | Small, hard bumps under the eyelids, which eye doctors call eye cobblestones. |
You may not be able to see eye cobblestones in your child's eyes. Your child may simply say it feels like there is something stuck under the eyelids. Do not try to pull the eyelids back to look for cobblestones at home [1]. Tell your eye doctor what your child is feeling so they can examine the eyes safely.
Causes and Risk Factors
Allergies cause VKC. If your child is allergic to something, their immune system overreacts to it, and when particles of the allergen get in the eyes, inflammation follows. Pollen and other plant allergens that are worse in spring and summer usually cause VKC [1]. Known risk factors include:
Sex and age: males are more likely to develop VKC, and it typically affects children and young adults between the ages of 5 and 20 [1].
Other conditions: seasonal allergies, eczema, asthma or dermatitis can raise the risk [1].
Family history: around half of children with VKC have a biological family member with it, so it may be a genetic condition, which experts are still studying [1].
Possible Complications
VKC can get worse over time, and each episode can be more severe than the last [1]. That is why it is important to get a diagnosis and treatment as soon as symptoms appear. It is rare, but untreated VKC can damage the eyes, and the inflammation can lead to corneal ulcers, cataracts or keratoconus [1]. Treating the inflammation helps you avoid these complications.
The Diagnostic Pathway
An eye doctor diagnoses VKC with an eye exam. Tell the doctor when you or your child first noticed symptoms, whether they seem worse at any time of year, and whether they come and go. Most of the time the doctor can diagnose VKC by looking at your child's eyes and learning about the symptoms. They may also collect a sample of eye discharge or swab the cobblestones under the eyelids to look for signs of infection or for elevated mast cells [1]. These cells usually help fight infections but can also cause allergic reactions.
Management and Treatment Options
Your eye doctor will suggest a treatment plan. Your child might need:
Artificial tears: usually over-the-counter eye drops that lubricate the eyes. Your eye doctor will suggest the right type.
Medicated eye drops: drops containing a prescription medicine such as an antihistamine or a corticosteroid [1]. Your eye doctor might suggest a mast cell stabilizer, which calms overactive mast cells and may reduce the severity of flares. Steroid eye drops should be used only as directed with regular eye checks, because long-term use can raise eye pressure and cause glaucoma or cataracts.
Cool compresses: a damp washcloth or towel placed gently on the eyes, with no pressure, to soothe itching and irritation [1]. Tell your child not to rub or press on their eyes.
NSAIDs: over-the-counter medicines such as ibuprofen reduce inflammation, but talk to your eye doctor before using them for VKC [1].
Long-Term Management
Avoiding allergens is hard in spring and summer, but you can track allergy seasons and plan to avoid being outside when the allergens that affect your child are high. Sunglasses or a hat can help with light sensitivity [1]. Your eye doctor may also refer your child to an allergist, who can test for allergies and prescribe medicines or allergy shots to treat them [1].
When to See a Doctor
Visit a healthcare provider or eye doctor if you notice new symptoms or changes in your child's eyes, especially if redness, sensitivity or other problems last more than a few days. See an eye doctor right away if your child's vision suddenly gets worse [1]. Tell the doctor if symptoms start happening more often or if treatments seem to help less.
Outlook
VKC can be annoying to manage, but it is usually temporary. Most children stop having symptoms after puberty [1]. If it does not go away completely, your child will probably have fewer flares, and flares after puberty are usually milder [1]. Once you find treatments that work, VKC should have less impact on your child's eyes and daily routine.
Conclusion
Vernal keratoconjunctivitis is a frustrating but treatable allergic eye condition. Working closely with an eye doctor on a plan that combines lubricating drops, medicated drops when needed, cool compresses and trigger avoidance can bring substantial relief and protect your child's eyes from complications. Because most children outgrow VKC after puberty, the long-term outlook is good for many families.
Frequently Asked Questions
Is vernal keratoconjunctivitis contagious?
No. VKC is caused by an allergic reaction, not an infection, so it does not spread from one person to another.
Why is it called vernal?
Vernal is a Latin word that means springtime. VKC affects children during the spring and summer, when there are many allergens in the air.
Will my child grow out of VKC?
Often, yes. Most children stop having symptoms after puberty. If it does not go away completely, your child will probably have fewer flares, and flares after puberty are usually milder.
What are eye cobblestones?
Eye cobblestones are small, hard bumps under the eyelids. You may not be able to see them, but your child may say it feels like something is stuck under the eyelid.
Can VKC damage my child's vision?
It is rare, but untreated VKC can damage the eyes. The inflammation can lead to corneal ulcers, cataracts or keratoconus, and each episode can be more severe than the last, so early diagnosis and treatment matter.
How is VKC different from regular pink eye?
Keratoconjunctivitis is similar to pink eye, but it irritates both the cornea and the conjunctiva at the same time. VKC is caused by allergies, usually to pollen and other plant allergens that are worse in spring and summer.
Should my child wear sunglasses?
Wearing sunglasses or a hat can help your child manage light sensitivity, and it can help when you plan around days with high allergen levels.
Can my child use over-the-counter allergy eye drops?
You may be able to use over-the-counter allergy drops, but check with your eye doctor first so your child gets the right type for their condition.
Is rubbing the eyes harmful?
Tell your child not to rub or press on their eyes. A cool compress placed gently on the eyes with no pressure can soothe itching and irritation, and medicated drops may be needed to calm a flare.
When should I see a doctor right away?
See an eye doctor right away if your child's vision suddenly gets worse. Visit a healthcare provider or eye doctor if redness, sensitivity or other problems last more than a few days, or if flares become more frequent or treatments seem to help less.
Related Reading
Allergic Conjunctivitis: Why Your Eyes Itch Every Spring — and the Simple Habits and Eyedrops That Stop It explains seasonal eye allergies and how to relieve them.
Giant Papillary Conjunctivitis (GPC): What It Is, Why It Happens, and How It's Treated covers another allergic eye condition that causes bumps under the eyelid.
Keratitis: Symptoms, Causes & Treatment Guide explains inflammation of the cornea and why it needs prompt care.
Eye Drops: Types, Uses, Risks and How to Use Them Safely explains the main types of eye drops and how to use them safely.
References
Cleveland Clinic. Vernal Keratoconjunctivitis. Cleveland Clinic. Last updated September 17, 2025. https://my.clevelandclinic.org/health/diseases/vernal-keratoconjunctivitis
Roumeau I, Coutu A, Navel V, et al. Efficacy of medical treatments for vernal keratoconjunctivitis: A systematic review and meta-analysis. J Allergy Clin Immunol. 2021;148(3):822-834. PMID 33819510. https://doi.org/10.1016/j.jaci.2021.03.026
Erdinest N, Noyman DBE, London N, et al. Applications of topical immunomodulators enhance clinical signs of vernal keratoconjunctivitis (VKC) and atopic keratoconjunctivitis (AKC): a meta-analysis. Int Ophthalmol. 2024;44(1):157. PMID 38522059. https://doi.org/10.1007/s10792-024-03097-7
Sharma S, Dandekar P, Nagpal V, et al. Surgical Management of Corneal Sequelae of Vernal Keratoconjunctivitis. Semin Ophthalmol. 2026;41(1):174-183. PMID 40884264. https://doi.org/10.1080/08820538.2025.2551061
Medical disclaimer
The information provided in this article is for educational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
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