Question

Three events occur to bring the image into focus on the retina: accommodation, pupil constriction, and convergence. Test your knowledge about these events by answering these questions.

True or False:

1. Accommodation is a result of parasympathetic stimulation from the optic nerve (I). TrueFalse
2. In accommodation, the lens becomes more spherical in shape. TrueFalse
3. One reason accommodation becomes more difficult as an object is brought closer to the eye is because the lens cannot become any more flattened. TrueFalse
4. When we look at a close-up object, the pupil diameter decreases. TrueFalse
5. When the pupil is constricted, the light entering the eye tends to pass through the center of the lens rather than through the edges of the lens. TrueFalse
6. The smaller the pupil diameter, the more light enters the eye and is directed toward the retina. TrueFalse
7. Both pupils can pick up the light rays when the eyes are looking forward. TrueFalse
8. Convergence states that eyes are rotated medially as an object moves closer. TrueFalse
9. In convergence, rotation of the eyes is accomplished by the medial oblique muscles. TrueFalse
10. An observer can see convergence by watching the medial rotation of the eyes of the subject when bringing an object toward the nose. TrueFalse