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The above is a diagram of the nasolacrimal drainage system. Understanding the workings of this system is key to the successful management of tearing in the patient of any age.

1.	The most common site for obstruction causing tearing in the infant and young child is:
	a. the lower punctum b. common canaliculus c. valve of Rosenmueller d. valve of Hasner e. none of the above
2.	Blockage of tear drainage from stenosis of the lacrimal duct in an adult patient who has had multiple failures at attempts to probe the system can be treated best with:
	a. Crawford tubes b. excision of the lacrimal sac c. conjunctivorhinostomy d. dacryocystorhinostomy e. none of the above
3.	The inferior turbinate:
	a. is missing in more than 2/3 of patients with chronic tearing b. can be infractured at the time of probing if it is obstruction outflow c. can be identified at probing using a nasal speculum d. (b) and (c) e. none of the above

For answers to the above, click here on or after June 22, 2010.