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Purpose: To evaluate the efficacy of nasolacrimal duct probing as the treatment of nasolacrimal duct obstruction in children younger than 4 years., Material and Methods: A total amount of 320 eyes in 275 children 4 to 48 months old, receiving nasolacrimal duct probing were enrolled in a retrospective study. The patients were divided into 4 groups depends on age: I group--4-12 months, II group--12-24 months, III group--24-36 months and IV group--36-48 months., Results: The percentage of efficient duct probing was: in I group--84%, in II group--79%, in III group--78% and in IV group--59%., Conclusions: In children 4 to 36 months old, probing is a successful treatment of nasolacrimal duct obstruction with no decline in treatment success with increasing age.

Purpose: The aim of the study was to evaluate the species of the microorganisms and their susceptibility to antibiotics in congenital nasolacrimal duct obstruction in children., Material and Methods: The pus secretion after lacrimal sac massage was obtained from 81 children with congenital nasolacrimal duct obstruction. The laboratory diagnostics was performed using typical microbiological procedures. The modification of these procedures was 24-hour pre-incubation in sugar boullion., Results: The most frequently isolated bacteria were Staphylococcus epidermidis (28%) and Staphylococcus aureus (22%). The isolated staphylococci (only coagulase-negative species MRSE) were resistant to methicillin in 2 cases. Streptococci were obtained in 20% isolations: Streptococcus pneumoniae (14%), Streptococcus viridans (6%). Gram-negative bacilli Pseudomonas aeruginosa and Moraxella spp. and Candida albicans were isolated in a few cases. Negative results of the cultures were obtained in 25% cases., Conclusions: The microorganisms typically constituting physiological flora of conjunctival sac may become the pathogens in the complications of congenital nasolacrimal duct obstruction in children.