In the human eye, most of the "bending" of light by the eye is performed by the cornea - the outer curved surface of the eye. The lens of the eye is responsible for only a relatively small amount of bending but it is adjustable allowing the eye to form a clear image on the retina of objects at varying distances from the eye. The refractive index of the vitreous humor is 1.34.

Consider the simplified model of the eye shown below.

a. What must the radius of curvature of the "cornea" be in order to form an image of a distant object on the "retina"?

b. What must the radius of curvature of the "cornea" be in order to form an image on the "retina" of an object which is 32.2 cm from the front of the "eye"?

2.00 cm -cornea 2.00 cm lens iris/pupil vitreous humor retina