[Graduated Treatment Concept for Connatal Dacryostenosis].

Unresolved epiphora in childhood is one of the most frequent issues in paediatric ophthalmology. In this context, connatal nasolacrimal duct obstruction (CNLDO) is the most important differential diagnosis and the condition is caused by a persistent Hasner's membrane in most cases. As there is a risk of complications, treatment should be considered. Therapeutic options include conservative and invasive approaches. As CNLDO is associated with high spontaneous recovery rates during the first years of life, the indication for invasive interventions must be carefully deliberated in that period. Conservative treatment with digital compression of the lacrimal sac should be performed whenever CNLDO is suspected. Invasive treatment is recommended in case of complications such as acute dacryocystitis or recurrent ascending infections. Furthermore, CNLDO seems to be amblyogenic. In addition to probing and syringing, temporary intubation of the lacrimal duct is possible. Further transcanalicular approaches include dacryoendoscopy or balloon dacryoplasty. Dacryocystorhinostomy should be reserved for special indications, although it has a low rate of complications and treatment is successful in 90 % of cases. The available treatment approaches can be integrated into a graduated treatment concept, which is influenced by many factors and should therefore be individualised.