الفهرس 
Physiology of lacrimal eleminationOnly 14 pages are availabe for public view
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Abstract
Dacryocystorhinostomy (DCR) is the operation of choice to releif epiphora due to primary acquired nasolacrimal duct obstruction (PANDO). DCR can be approached by one of three methods; the endonasal approach the external technique and the transcanalicular approach.