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Study of tear film flow and stability in chronic dacryocystitis

Abstract. Tear film flow and stability studies were carried out in patients suffering from chronic dacryocystitis by performing Schirmer test‐I and tear film break‐up‐time (BUT) measurements. The results of Schirmer's test corroborated the theory that a reduced out flow of tears causes a compensatory reduced tear secretion. The results of break‐up‐time confirm the fact that BUT is independent of outflow of tears in patients with epiphora.