EYE QUIZ


1.    What is the primary (most powerful) focusing structure of the eye? cornea

2.    Which type of photoreceptor is best able to process bright light and color? cone

3.    The vitreous humor, which occupies about 80% of the eye’s interior, is composed mostly of
what? water

4.    A “cataract” is an opacification of which eye structure? crystalline lens

5.    Which eye structure determines a person’s eye color? iris

6.    Which eye structure is comparable to the film of a camera because it senses light focused on
it? retina

7.    “Pink eye” is an inflammation of which eye tissue? conjunctiva

8.    Which cranial nerve innervates four of the six extraocular muscles (medial rectus, superior
rectus, inferior rectus, and inferior oblique)? cranial nerve III

9.    What is the point of sharpest, most distinct visual acuity within the eye?           fovea
centralis

10. The optic nerve is known also as what cranial nerve? cranial nerve II

11. A palsy of which extraocular muscle most likely will result in an esotropia (turning inward) of
the affected eye? lateral rectus

12. In the tiny foveola, at the center of the fovea, there are approximately how many cones? 25,000

13. As an increasing amount of light enters the eye, the pupil does what? constricts

14. What ocular tissue provides protection for the eye and serves as an attachment for the
extraocular muscles which move the eye? sclera



EYE QUIZ


15. What is the primary (most powerful) focusing structure of the eye? cornea

16. Which type of photoreceptor is best able to process bright light and color? cone

17. The vitreous humor, which occupies about 80% of the eye’s interior, is composed mostly of what?
water

18. A “cataract” is an opacification of which eye structure? crystalline lens

19. Which eye structure determines a person’s eye color? iris

20. Which eye structure is comparable to the film of a camera because it senses light focused on
it? retina

21. “Pink eye” is an inflammation of which eye tissue? conjunctiva

22. Which cranial nerve innervates four of the six extraocular muscles (medial rectus, superior
rectus, inferior rectus, and inferior oblique)? cranial nerve III

23. What is the point of sharpest, most distinct visual acuity within the eye?           fovea
centralis

24. The optic nerve is known also as what cranial nerve? cranial nerve II

25. A palsy of which extraocular muscle most likely will result in an esotropia (turning inward) of
the affected eye? lateral rectus

26. In the tiny foveola, at the center of the fovea, there are approximately how many cones? 25,000

27. As an increasing amount of light enters the eye, the pupil does what? constricts

28. What ocular tissue provides protection for the eye and serves as an attachment for the
extraocular muscles which move the eye? sclera