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Cornea & External Diseases

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Non Infectious
Posterior Embryotoxon: prominent Schwalbe's line is visible just inside the temporal limbus.

  • May occur as an isolated finding or as a spectrum of Axenfeld-Rieger's anomaly
  • Occurs in approximately 15% of normal eyes
  • Clinical features:
    • Thickened or hypertrophied Schwalbe's ring that is anteriorly displaced
    • Visible through a clear cornea as a sharply defined, concentric white line or opacity anterior to the limbus
    • When associated with Axenfeld-Rieger's anomaly, bilateral involvement with multiple bridging peripheral iris strands and iris stromal hypoplasia are characteristic

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