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OBJECTIVE To illustrate the value of digital subtraction dacryocystography in the diagnosis of lacrimal duct obstruction. METHODS Eighty-two normal eyes and 56 eyes with epiphora were investigated with digital subtraction dacryocystography and the dacryocystogram were studied. RESULTS Lacrimal drainage system imaging by the digital subtraction dacryocystography provided reliable and accurate demonstration of lacrimal duct obstruction. CONCLUSIONS Digital subtraction dacryocystography is a rapid, effective and noninvasive imaging technique, and it is helpful in the diagnosis, treatment and study of lacrimal duct obstruction.
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