2020–2021 BCSC Basic and Clinical Science Course™
6 Pediatric Ophthalmology and Strabismus
Part II: Pediatric Ophthalmology
Chapter 21: Disorders of the Anterior Segment
Abnormalities of Peripheral Corneal Transparency
Posterior embryotoxon (prominent Schwalbe line) represents a thickening and anterior displacement of the Schwalbe line, causing the anomaly to be seen as an irregular white line just concentric with and anterior to the limbus (Fig 21-3). It is a common isolated finding (occurring in 15% of healthy patients) but is often seen in Axenfeld-Rieger syndrome, arteriohepatic dysplasia (Alagille syndrome), and velocardiofacial syndrome (22q11 deletion syndrome).
Excerpted from BCSC 2020-2021 series: Section 10 - Glaucoma. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.