The results of the examinations of the lacrimal drainage system by means of dacryocystography and echography are described, and the comparative advantages of these two methods discussed. Dacryocystography provides exact radiophotographs of all parts of the lacrimal drainage system. Ultrasound diagnosis is applicable only in diseases of the lacrimal sac. It can be used well to indicate dacryocystorhinostomy and to control the condition after the operation. This method has some advantages over radiological diagnostics: it can be used without any contrast medium, the method is useful when either the canaliculi or the common canaliculus are occluded. It is quick, the patient is not exposed to radiation, it is not expensive, and the presence of another specialist is not necessary.
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