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  Indian J Med Microbiol
 

Figure 3: Classic dacryocystography, showing a patent system on the right side with descent of the radio-opaque agent to the nasal and oral cavities. On the contrary, the system to the left side is obstructed, with a block to the superior nasolacrimal duct

Figure 3: Classic dacryocystography, showing a patent system on the right side with descent of the radio-opaque agent to the nasal and oral cavities. On the contrary, the system to the left side is obstructed, with a block to the superior nasolacrimal duct