Congenital Nasolacrimal Duct Obstruction

Sasha Mansukhani
Congenital Nasolacrimal Duct Obstruction - Investigations
Fluorescein Dye Disappearance test
It is a fairly sensitive (90%) and specific (100%) test in evaluation of outflow obstruction in infants(16). A drop of 2 % Fluorescein solution is put in both the eyes and the excess dye is wiped off. After 5 minutes, the tear meniscus is observed for retained dye. In a normal test, the dye is not present after 5 minutes, while in an obstruction, the dye may get diluted but will remain at the end of 5 minutes.

Congenital Nasolacrimal Duct Obstruction Congenital Nasolacrimal Duct Obstruction
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