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The limbal region is the border between cornea and sclera and houses limbal epithelial stem cells. It renews the corneal surface and acts as a barrier against conjunctival overgrowth. Vessels and nerves at the limbus support healing and sensing. Surgeons use the limbus as a landmark for safe entry points.
read more about limbus function ...Healthy limbal cells maintain a smooth, clear epithelium for sharp optics. Compromise leads to irregularity, haze, and vascular ingrowth. Contact lens fitting and surgery planning protect this zone. Evaluation includes staining patterns and imaging when needed.
They are progenitor cells that repopulate corneal epithelium. Loss causes limbal stem cell deficiency with surface instability. Symptoms include light sensitivity and recurrent erosions. Management ranges from protection to transplantation.
It prevents conjunctival tissue from creeping onto the cornea. Disruption allows vascularized tissue to cross the border. Optical quality falls as the surface becomes irregular. Restoring limbal function stabilizes the boundary.
Cataract incisions, glaucoma surgeries, and pterygium removal work near this zone. Precision protects stem cells and nerves. Topography and microscopy inform planning. Post-op care supports healing.
Low-oxygen designs and mechanical edge pressure stress the limbal region. High-oxygen materials and proper fit reduce risk. Scleral lenses vault the limbus to protect the surface. Regular checks find early changes.
The limbal region contains stem cells that continually renew the corneal epithelium and provide nutrients. It also serves as a physical barrier to keep conjunctival tissue from growing onto the cornea.
Depletion leads to limbal stem cell deficiency, resulting in conjunctivalization of the cornea, vascularization, chronic inflammation and loss of corneal transparency. Vision can be severely impaired.
Treatment may include autologous or allogeneic limbal stem cell transplantation, amniotic membrane grafting and use of growth factors or serum eye drops to promote healing.