The human eye has an optical system that can be described in average terms as a schematic eye. This eye has several values that should be familiar to any ophthalmologist.

1.	What is the refracting power of the front surface of the eye in diopters?
	a. 50.86 b. 48.83 c. 45.98 d.  45. 03 e. 43.05
2.	What is the refracting power of the lens at rest in diopters?
	a. 19.11 b. 20.06 c. 21.33 d.  22.06 e. none of the above
3.	What is the length of the reduced schematic eye?
	a. 25.055 mm b. 24.665 mm c. 23.755 mm d.  23.035 mm e. 22.785 mm

For answers to the above, click here on or after October 23, 2007.