Posterior Embryotoxon

Posterior Embryotoxon
SYMPTOMS No symptoms
SIGNS Concentric, white opacification anterior to the limbus - usually temporal and/or nasal
WORK-UP Thorough history and slit lamp examination. Gonioscopy may be considered
TREATMENT Observation, no treatment is indicated
FOLLOW-UP Frequent follow-ups are rarely necessary.
ETIOLOGY Inheritance - autosomal dominant
DIFFERENTIAL DX White limbal girdle of Vogt | Arcus senilis
NOTES Posterior embryotoxon is thought to indicate an anteriorly displaced Schwalbe line | Patients with posterior embryotoxon may be at higher risk for glaucoma | May be associated with Axenfeld-Reiger syndrome | Occurs in up to 15% of the normal population