introduction: Fluorescein dye disappearance test is a noninvasive, relatively objective and quantitative test for identifying a disorder of the lacrimal drainage system. It is useful for patients with poor compliance, including infants.

 Fluorescein dye disappearance test is the most simple methods for assessing FNDO clinically

aim:

1–To assess the role of FDDT  in patients with epiphoraforpre and post operative assessment of  nasolacrimal duct obstruction .

2–To evaluate the correlation of FDDT with symptomatology at different time points

method: . All patient presenting to out patient department with complaint of epiphora were included in the study. All subjects underwent  FDDT before surgery ,and on day 1, 2^nd 4^th and 8^th week of surgery. The tearing symptom score (TSS), were evaluated simultaneously at these five time points based on questionnaire. 

result: 54 were enrolled in study .  There was statistically significant differene  between mean values of FDDT and TSS between study group and control preoperatively .There was significant differences in mean values of FDDT and TSS in pre and postoperative assessment in  study group .