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.
		ADDITIONAL LAB \| TESTS	None
		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