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This is the view of the cornea and lower limbus of an eye that has a drop of fluorescein placed.

1.	This study demonstrates:
	a. the tear film b. the material that is staining green is on the corneal epithelium c. the stained substance is important for protection and lubrication of the cornea d. the integrity of this substance is dependent on neuro integration of cranial nerves V and VII e. all of the above
2.	A unique feature of the limbus is:
	a. the muscle of Riolan b. ciliary processes c. drainage sites of Schlemm”s canal d. stem cells e. none of the above
3.	The green stained layer contains:
	a. lipid b. aqueous c. mucin d. (a), (b), and (c) e. none of the above

For answers to the above, click here on or after October 19, 2010.