The ocular sequelae of Stevens-Johnson syndrome and toxic epidermal necrolysis often matter more to a patient’s long-term vision than the acute illness itself, since the ocular surface damage from the acute drug reaction can continue to progress silently for years afterward through chronic inflammation and scarring, long after the skin has healed and the patient may consider themselves recovered.


The Acute Phase

Stevens-Johnson syndrome and toxic epidermal necrolysis are severe, usually drug-induced, mucocutaneous reactions causing widespread epidermal and mucosal necrosis, including the ocular surface in a substantial proportion of affected patients.

Acute ocular involvement ranges from mild conjunctival injection to severe pseudomembranous conjunctivitis with corneal epithelial defects, and the severity of acute involvement is one of the strongest predictors of chronic ocular sequelae, though even patients with modest acute involvement can develop significant late complications.


Why Aggressive Acute Treatment Matters

Amniotic membrane transplantation applied to the ocular surface during the acute phase, within the first days to roughly two weeks of onset, has substantially reduced the rate of severe chronic ocular sequelae in reported series compared with supportive care alone.

This reflects a broader principle in Stevens-Johnson syndrome ophthalmic care: the chronic scarring and limbal stem cell failure that develop later are, in large part, the consequence of the acute inflammatory and cicatrizing process, so intervening early and aggressively during the acute phase has a real chance of changing the entire long-term trajectory for that patient’s eyes.


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Chronic Ocular Sequelae

  • Dry eye disease, from destruction of the lacrimal gland ducts, goblet cells, and meibomian glands during the acute illness, often severe and lifelong
  • Symblepharon, adhesions between the palpebral and bulbar conjunctiva, which can progressively restrict eye movement and eyelid function
  • Trichiasis and entropion, from eyelid margin scarring, causing chronic mechanical trauma to the cornea from misdirected lashes
  • Limbal stem cell deficiency, from destruction of the limbal stem cell niche during the acute inflammatory process, leading to progressive corneal conjunctivalization, vascularization, and opacification (see limbal stem cell deficiency)
  • Corneal scarring and, in severe cases, keratinization of the ocular surface
  • Meibomian gland dysfunction and loss, contributing further to the severe evaporative and cicatricial dry eye picture

Long-Term Surveillance

Patients who have had Stevens-Johnson syndrome or toxic epidermal necrolysis with ocular involvement need lifelong ophthalmic follow-up, since progressive scarring and surface failure can continue to develop years after the acute illness, even when the eyes appeared relatively stable in the interim.

  • Regular assessment of eyelid margin position and lash direction, since trichiasis can develop or progress gradually
  • Monitoring for symblepharon progression and fornix shortening
  • Assessment of corneal clarity and limbal stem cell function over time
  • Aggressive, ongoing management of the severe chronic dry eye that most patients develop

Management of Chronic Disease

Ocular Sequelae of Stevens-Johnson Syndrome: A Slow-Motion Second Injury After the Acute Illness

Ocular Surface Support

Intensive, preservative-free lubrication, punctal occlusion, and scleral contact lenses, which vault over the irregular and dry corneal surface and bathe it in a fluid reservoir, are central to managing chronic dry eye and can substantially improve both comfort and vision in appropriately fitted patients.

Eyelid Surgery

Trichiasis and entropion require surgical correction, sometimes repeatedly over time as scarring continues, to prevent ongoing mechanical corneal trauma.

Limbal Stem Cell and Corneal Surgery

Standard limbal stem cell transplantation is often less successful in Stevens-Johnson syndrome than in other causes of limbal stem cell deficiency, because the ongoing inflammatory and cicatrizing surface environment tends to cause transplanted stem cells to fail; for this reason, keratoprosthesis, particularly the Boston type II or osteo-odonto-keratoprosthesis, is more often considered for severe bilateral disease with an inhospitable ocular surface (see Boston keratoprosthesis).


Prognosis

Ocular outcomes vary enormously, from patients with mild, well-controlled chronic dry eye and normal vision to those with severe, progressive surface failure and significant visual impairment despite aggressive treatment.

Early, aggressive acute-phase treatment, particularly with amniotic membrane transplantation when indicated, along with vigilant, lifelong follow-up for chronic sequelae, offers the best chance of preserving vision over the patient’s lifetime.


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References

  1. Gregory DG. Treatment of acute Stevens-Johnson syndrome and toxic epidermal necrolysis using amniotic membrane: a review of 10 consecutive cases. Ophthalmology. 2011;118:908-914.
  2. Sotozono C, Ueta M, Koizumi N, et al. Diagnosis and treatment of Stevens-Johnson syndrome and toxic epidermal necrolysis with ocular complications. Ophthalmology. 2009;116:685-690.
  3. Jain R, Sharma N, Basu S, et al. Stevens-Johnson syndrome: the role of an ophthalmologist. Surv Ophthalmol. 2016;61:369-399.
  4. Iyer G, Pillai VS, Srinivasan B, et al. Mucous membrane grafting for lid margin keratinization in Stevens-Johnson syndrome. Cornea. 2010;29:145-151.

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  1. Stevens-Johnson syndrome and toxic epidermal necrolysis are usually induced by which exposure?

Ahmed Ophthalmologist

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