Work Step by Step
Option A is incorrect. The cornea is the clear front portion of the eye. This layer covers the iris and the pupil and is responsible for partially bending light rays entering the eye. Option B is incorrect. The iris of the eye is made of muscles and surrounds the pupil of the eye. The muscles of the iris control how much light comes into the eye. Option D is incorrect. The optic nerve transmits information from the eyes to the brain. Option C is correct. The retina is the layer in the back inner portion of the eyeball where an image is focused. This layer consists of the receptor cells called rods and cones.