Posterior Polymorphous Dystrophy

• A slowly progressive, uncommon, dominantly inherited condition.

Clinical Features

• Usually bilateral but often asymmetric.
• Variable clinical features include isolated or coalescent posterior corneal vesicular (the most distinctive characteristic), multi-layered Descemet's membrane thickening and band-like configuration with sharp scalloped margin.
• The peripheral abnormal multi-layered endothelial cells may cause localized iridocorneal adhesion.
• Symptom: most cases are asymptomatic and do not require treatment.
• If the condition progresses to corneal decompensation, definitive treatment with penetrating keratoplasty is usually required.