COMPARATIVE STUDY
JOURNAL ARTICLE
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Reliability of fluorescein dye disappearance test in assessment of adults with nasolacrimal duct obstruction.

PURPOSE: To evaluate the role of fluorescein dye disappearance test (FDDT) in assessment of adults with primary acquired nasolacrimal duct obstruction (PANDO) and its correlation with age and severity of epiphora.

METHODS: In a prospective, cross-sectional comparative study, FDDT at 2 (2-FDDT), 5 (5-FDDT), and 10 (10-FDDT) minutes were performed in 58 eyes of 58 patients with PANDO (case) and 58 eyes of 58 subjects without epiphora (control) between 2008 and 2010. Exclusion criteria were any disease, trauma, or medications that might have an effect on tear drainage system. Patients with functional or incomplete obstruction and upper lacrimal drainage system obstruction were excluded in the case group. FDDT and severity of epiphora were graded.

RESULTS: Case and control groups were matched. 2-FDDT showed a sensitivity of 82.8%, specificity of 91.4%, positive predictive value of 90.6%, and negative predictive value of 84.1%. Sensitivity and negative predictive value decreased to 71.1% and 78.6% in 5-FDDT. 5-FDDT specificity and positive predictive value, however, increased to 94.8% and 93.5%, respectively. There was no statistically significant correlation between severity of epiphora and age with FDDT.

CONCLUSIONS: FDDT is a simple, reliable, and highly specific test in assessment of adults with PANDO.

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