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The corneal limbus is the junction between the cornea and sclera that houses limbal epithelial stem cells. Damage can occur from chemical or thermal burns, autoimmune inflammation, chronic contact lens wear, or infections. Repeated surgery or trauma may also harm this region. Injury risks limbal stem cell deficiency, which impairs corneal surface renewal.
read more about limbus damage causes ...Alkali burns penetrate rapidly and can destroy limbal cells. Long-term hypoxia and mechanical friction from contact lenses may contribute to dysfunction. Ocular surface diseases such as Stevens?Johnson syndrome and severe dry eye increase vulnerability. Early decontamination and specialist care improve outcomes after acute exposure.
Extended wear, poor fit, or low-oxygen materials can stress the limbal area. Modern high-oxygen lenses and proper hygiene reduce risk. Symptoms include redness, irritation, or peripheral neovascularization. Regular follow-up helps detect early changes.
Alkalis saponify cell membranes and penetrate tissues quickly. Immediate irrigation is critical to limit damage. Severity depends on agent, concentration, and contact time. Specialist management guides staged healing.
Conditions like ocular cicatricial pemphigoid and peripheral ulcerative keratitis can involve the limbus. Chronic inflammation disrupts stem cell niches and surface stability. Systemic therapy may be required to control activity. Close coordination with rheumatology is common.
Persistent epithelial defects, recurrent erosions, and vascular ingrowth are typical. Patients report photophobia, blur, and irritation. Fluorescein staining shows irregular epithelium crossing onto the cornea. Early referral supports targeted care.
The limbus is the border region between the cornea and the sclera. It contains stem cells that regenerate the corneal epithelium and maintain corneal clarity.
Chemical burns, infections, inflammatory diseases and surgery can damage the limbal stem cells. Loss of these cells impairs corneal healing and can lead to conjunctival overgrowth (pterygium).
Treatment may include lubricating drops, anti-inflammatory medications and, in severe cases, limbal stem cell transplantation or amniotic membrane grafting to restore the corneal surface.