Skip to content
How It Works
Explore
Resources Ask a Question
Who It's For
Patients Caregivers Providers
Log In Ask a Question
PubMed This is a summary of 16 peer-reviewed journal articles Updated
Ophthalmology

How Does Eye Rubbing Cause Keratoconus in VKC?

At a Glance

Eye rubbing is dangerous for children with vernal keratoconjunctivitis (VKC) because it can lead to keratoconus, a vision-threatening condition. VKC inflammation chemically softens the cornea, while the physical grinding of rubbing causes the weakened tissue to thin and bulge outward.

Eye rubbing is one of the most significant risk factors for a child with vernal keratoconjunctivitis (VKC) developing a vision-threatening condition called keratoconus [1]. When a child rubs their eyes, they apply severe mechanical stress to the clear, dome-shaped front surface of the eye (the cornea) [2]. This repetitive physical trauma, combined with the intense inflammation of VKC, physically weakens the cornea, causing it to thin out and bulge forward into a cone shape [3][4].

The “Double Hit”: How VKC and Rubbing Damage the Eye

Keratoconus in VKC is caused by a specific combination of mechanical trauma and chemical inflammation [3].

  • Mechanical Stress: Vigorous rubbing, especially when children use their hard knuckles, exerts direct, repetitive pressure on the cornea [2]. Over time, this physical force alters the cornea’s internal structure and breaks down its supportive fibers [5][6].
  • Chemical Weakening: VKC naturally causes severe inflammation on the surface of the eye. This inflammation releases specific enzymes (sometimes called MMPs) that degrade and soften the corneal tissue [7].

When the cornea is already softened by VKC inflammation, the physical grinding of eye rubbing acts as a catalyst, accelerating corneal thinning and bulging [1]. If left unchecked, this progression can affect vision and may require a specialized procedure called corneal cross-linking, which uses vitamins and UV light to strengthen the cornea and halt the bulging [8].

Practical Strategies to Stop Eye Rubbing

Telling a child with VKC to simply “stop rubbing” rarely works, because the itching they experience is overwhelming [3]. Instead of focusing on discipline, you can use a combination of proactive medical, physical, and behavioral strategies to give them relief:

  • Use prescribed anti-itch drops proactively: The most effective way to stop eye rubbing is to prevent the itch from starting [9]. Rely on the medications prescribed by your eye doctor—such as topical antihistamines or calcineurin inhibitors (like tacrolimus or cyclosporine)—exactly as scheduled, rather than waiting for your child to complain of itching [10][11].
  • Try chilled artificial tears: Ask your doctor if it is safe to keep your child’s lubricating eye drops or artificial tears in the refrigerator. Chilled drops can help flush out allergens while providing the soothing, numbing effect of cold therapy [12].
  • Apply cold compresses: When a sudden urge to itch strikes, place a clean, cold, damp washcloth or a chilled gel pack over your child’s closed eyes. Make sure to wrap gel packs in a thin cloth to protect the delicate skin around the eyes. The cold temperature helps shrink blood vessels and temporarily numbs the nerve endings that signal itching [12].
  • Keep hands busy: If you notice your child reaching for their eyes, immediately redirect their hands to a different activity. Giving them a stress ball, a fidget toy, or engaging them in a game that requires both hands can physically interrupt the habit of rubbing [13].
  • Protect their eyes at night: Children often rub their eyes unconsciously while asleep. If you notice signs of nighttime rubbing, consider having them wear soft, breathable mittens to bed or using protective sleep goggles to create a physical barrier [14].
  • Identify and reduce environmental triggers: VKC flare-ups and the resulting itch are often triggered by environmental factors. Keep your child’s environment as free as possible from heavy dust, pet dander, and known allergens [15][16].

Common questions in this guide

Why does eye rubbing cause keratoconus in VKC?
Eye rubbing puts severe mechanical stress on the cornea. In a child with VKC, the eye's surface is already chemically weakened by inflammation. The combination of this soft tissue and the physical grinding of rubbing accelerates corneal thinning and bulging.
What is the best way to stop my child from rubbing their eyes?
The most effective method is to prevent the itch before it starts. Proactively using prescribed anti-itch medications, such as topical antihistamines or calcineurin inhibitors, helps control the underlying inflammation so the urge to rub never develops.
Do cold compresses help relieve VKC itching?
Yes, cold temperatures are highly effective for itch relief. Applying a cold compress or using chilled artificial tears shrinks blood vessels and temporarily numbs the nerve endings in the eye that signal the urge to itch.
How can I protect my child's eyes if they rub them in their sleep?
Nighttime rubbing can still cause significant damage to the cornea. If you notice signs of unconscious rubbing, such as extra redness or displaced eyelashes in the morning, consider having your child wear soft, breathable mittens or protective sleep goggles to bed.
What is the treatment if my child develops keratoconus?
If the cornea begins to bulge and thin, an ophthalmologist may recommend a specialized procedure called corneal cross-linking. This treatment uses a combination of vitamins and UV light to strengthen the corneal fibers and halt further bulging.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Does my child need a specialized imaging test, like a corneal topography, to screen for early signs of keratoconus?
  2. 2.Which specific anti-itch drops are safest for long-term daily use to prevent my child's urge to rub?
  3. 3.Are there steroid-sparing medications available that can safely control the underlying inflammation causing the itch?
  4. 4.Is it safe to keep my child's prescribed eye drops or artificial tears in the refrigerator for an added cooling effect?
  5. 5.What specific warning signs or changes in vision should I watch for that might indicate keratoconus is developing?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

Related questions

Can Biologics Treat Severe Vernal Keratoconjunctivitis?Are Cold Compresses Good for VKC Flare-Ups?Does Vernal Keratoconjunctivitis Go Away After Puberty?How Does Vernal Keratoconjunctivitis Affect Mental Health?How to Give Eye Drops to a Light-Sensitive ChildWhat Are the Best Ways to Prevent VKC Flare-Ups?What Are the Types of Vernal Keratoconjunctivitis (VKC)?What Are the Risks of Steroid Eye Drops for VKC?What Are the Symptoms of a VKC Shield Ulcer?Is It VKC or Seasonal Allergies? Symptoms ComparedWhen to Seek Emergency Care for a VKC Flare-Up?

References

References (16)
  1. 1

    Corneal topometric indices and proclivity toward corneal ectasia in vernal keratoconjunctivitis.

    Yilmaz YC, Ipek SC, Gobeka HH

    Journal francais d'ophtalmologie 2024; (47(1)):103792 doi:10.1016/j.jfo.2023.01.010.

    PMID: 37087321
  2. 2

    Effects of Mechanical Compression on Cell Morphology and Function in Human Corneal Fibroblasts.

    Zhang J, Yang S, Tan Y, Wang Y

    Current eye research 2021; (46(10)):1467-1473 doi:10.1080/02713683.2021.1904510.

    PMID: 34039223
  3. 3

    Vernal keratoconjunctivitis and keratoconus.

    Wajnsztajn D, Solomon A

    Current opinion in allergy and clinical immunology 2021; (21(5)):507-514 doi:10.1097/ACI.0000000000000765.

    PMID: 34269743
  4. 4

    Pathogenesis and complications of chronic eye rubbing in ocular allergy.

    Ben-Eli H, Erdinest N, Solomon A

    Current opinion in allergy and clinical immunology 2019; (19(5)):526-534 doi:10.1097/ACI.0000000000000571.

    PMID: 31343437
  5. 5

    Short-term digital ocular massage may weaken corneal biomechanics.

    Lam AKC, Lee SNS, Mui MWS, Ng VHY

    Frontiers in bioengineering and biotechnology 2025; (13()):1582973 doi:10.3389/fbioe.2025.1582973.

    PMID: 40606911
  6. 6

    The correlation between keratoconus and eye rubbing: a review.

    Najmi H, Mobarki Y, Mania K, et al.

    International journal of ophthalmology 2019; (12(11)):1775-1781 doi:10.18240/ijo.2019.11.17.

    PMID: 31741868
  7. 7

    A pilot study on Langerhans cells in keratoconus patients by in vivo confocal microscopy before and after corneal cross-linking and correlation with eye rubbing.

    Ferrini E, Posarelli C, Figus M, et al.

    Contact lens & anterior eye : the journal of the British Contact Lens Association 2024; (47(5)):102170 doi:10.1016/j.clae.2024.102170.

    PMID: 38677927
  8. 8

    Evaluation of 60 months long-term results of accelerated corneal cross-linking treatment in pediatric keratoconus patients with new progression indices.

    Horozoglu Ceran T, Kosekahya P, Koc M

    Japanese journal of ophthalmology 2025; doi:10.1007/s10384-025-01293-1.

    PMID: 41138021
  9. 9

    The role of environment in the pathogenesis of keratoconus.

    de Azevedo Magalhães O, Gonçalves MC, Gatinel D

    Current opinion in ophthalmology 2021; (32(4)):379-384 doi:10.1097/ICU.0000000000000764.

    PMID: 33966012
  10. 10

    Therapeutic efficacy of tacrolimus in vernal keratoconjunctivitis: a meta-analysis of randomised controlled trials.

    Zhao M, He F, Yang Y, et al.

    European journal of hospital pharmacy : science and practice 2022; (29(3)):129-133 doi:10.1136/ejhpharm-2020-002447.

    PMID: 33144336
  11. 11

    Combination of 0.05% Azelastine and 0.1% Tacrolimus Eye Drops in Children With Vernal Keratoconjunctivitis: A Prospective Study.

    Chen M, Wei A, Ke B, et al.

    Frontiers in medicine 2021; (8()):650083 doi:10.3389/fmed.2021.650083.

    PMID: 34604246
  12. 12

    Assessment of Drug Usage Pattern in Patients Treated for Vernal Keratoconjunctivitis Attending a Tertiary Eye Care Centre in Eastern India: A Cross-Sectional Study.

    Maitra A, Bhattacharyya S, Biswas A, et al.

    Nepalese journal of ophthalmology : a biannual peer-reviewed academic journal of the Nepal Ophthalmic Society : NEPJOPH 2018; (10(19)):57-65 doi:10.3126/nepjoph.v10i1.21690.

    PMID: 31056577
  13. 13

    Integrative Treatment Approaches with Mind-Body Therapies in the Management of Atopic Dermatitis.

    Yosipovitch G, Canchy L, Ferreira BR, et al.

    Journal of clinical medicine 2024; (13(18)) doi:10.3390/jcm13185368.

    PMID: 39336855
  14. 14

    Eye rubbing in the aetiology of keratoconus: a systematic review and meta-analysis.

    Sahebjada S, Al-Mahrouqi HH, Moshegov S, et al.

    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie 2021; (259(8)):2057-2067 doi:10.1007/s00417-021-05081-8.

    PMID: 33484296
  15. 15

    Prevalence of vernal keratoconjunctivitis and its associated factors among children in Gambella town, southwest Ethiopia, June 2018.

    Alemayehu AM, Yibekal BT, Fekadu SA

    PloS one 2019; (14(4)):e0215528 doi:10.1371/journal.pone.0215528.

    PMID: 30998721
  16. 16

    Sensitization and Clinical Characteristics of Congolese Children with Vernal Keratoconjunctivitis in Kinshasa.

    Muamba Nkashama L, Kayembe Lubeji D, Mwanza Kasongo JC, et al.

    Ocular immunology and inflammation 2023; (31(1)):15-20 doi:10.1080/09273948.2021.1976217.

    PMID: 34582304

This page provides educational information about vernal keratoconjunctivitis (VKC) and keratoconus. Always consult your pediatric ophthalmologist for medical advice and to determine the safest treatment plan for your child.

Get notified when new evidence is published on Vernal keratoconjunctivitis.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.