Congenital nasolacrimal duct obstruction

Usually due to persistent membrane at the valve of Hasner

Clinical features

• Systemically well
• Inflamed/excoriated periorbital skin
• White eye
• Thickened tear meniscus (2mm or more)
• Crusting of lashes
• May be complicated by mucoceole or conjunctivitis

Tests

• Positive fluorescein dye disappearance…