Test your optical knowledge!

Basic anatomy of the eye

1.   The innermost layer of the eye which is the light-sensing portion of the eye, is called the :    A. fovea    B. retina     C. macula     D. epidermis

2.   The retina contains ______, which are responsible for vision in low light, and ______, which are responsible for color vision and detail.
     A. ray & color cells    B. rod & cone cells     C. rod & reel cells

3.   The retina contains a chemical that converts light into electrical impulses that the brain interprets as vision. This is called _______,
or "visual purple."   
     A. rhodopsin    B. electrasin     C. endorphin    D. seratonin

4.   The ___________ conducts the electrical impulses to the brain.

     A. optic nerve       B. nerve of Schlemm      C. aqueous nervosa

5.  Covering the inside surface of the eyelids and sclera is a mucous 
     membrane called the _________.

      A.  Mucoid             B.  Conjunctiva         C. Coatus slimeus

1.   The round "dough-nut" shaped colored part of the eye is

        called the :   A. pupil   B. iris   C. sclera   D. cornea

2.  The "black" center part of the eye is called the :

        A. pupil   B. iris   C. sclera   D. cornea

3.    The "white" of the eye is called the :

        A. pupil   B. iris   C. sclera   D. cornea

4.   The clear membrane that covers the front of the eye is called the:

       A. pupil   B. iris   C. sclera   D. cornea

Home

Differences in eyes

1.    Bird eyes vary in color by the type of bird.

        A.  In the singing variety, the iris is :

                    a. brown   b. yellow   c. reddish

        B. In birds of prey, the iris is :

                    a. brown   b. yellow   c. reddish

        C. In the heron, parrot, and pheasant the iris is :

                    a. brown   b. yellow   c. reddish 

2.    The pupil is round in humans, many reptiles, fish, some

        amphibians, and in all birds except the :

            A. eagle   B. owl   C. penguin

3.    In the horse, goat, ox, and kangaroo, the pupil is oval with the

        long axis :   A. vertical    B. horizontal

4.    In the seal and alligator, the pupil is oval with the long axis :

        A. vertical    B. horizontal

5.    In the cat, fox, and owl, the pupil is a _____ slit.

          A. vertical    B. horizontal

Home

Advanced eye anatomy

1.    The cornea is a clear, multi-layer membrane that protects the eye. There are _____ layers that make up the cornea.

        A.2       B. 3       C. 5       D. 7

2.    The outer layer of the cornea is called the _____.

        A. epithelium     B. endothelium     C. Stroma    

        D. corneal ulcerations     E. Descemet's membrane

3.    The cilia that help protect the eye against foreign objects are called the  _____.

       A. fovea     B. rods     C. cones     D. eyelashes

Lens types

1.     The first bi-focal lens was designed by _________ . 

        A. Aristotle    B. Ben Franklin    C. Eli Whitney    D. Galileo

2.     Although there is basically one company that aggressively markets its progressive bifocal to produce name recognition, there are, in reality, over ____ different progressive bifocals on the market today.

        A. 5       B. 14       C. 81       D. 127

3.     Lens materials also have their place outside the optical world. Marketed under the name "lexan" in the non-optical world, _________ is used to fabricate bullet-proof windshields, motorcycle face shields and fighter plane cockpit canopies.

     A. glass     B. Colombia Resin#39     C. polycarbonate    D. flint glass

4.     Progressive bifocals allow you to use your distance vision and near vision anywhere in the lenses, even in the corners.

                      A. True                               B. False

How did you do?

Ranking: