Vison Lab Quiz

Question 1

_____ change in lens shape to focus on near object (<20 ft or 6 m)

Answer 1

accommodation

Question 2

_____ closest point on which an individual can focus clearly

Answer 2

near point

Question 3

_____ normal vision; no accommodation needed for focusing on far object

Answer 3

emmetropia

Question 4

_____ good far vision; near objects appear blurry; “farsightedness”

Answer 4

hyperopic

Question 5

_____ good near vision; far objects appear blurry; “nearsightedness”

Answer 5

myopia

Question 6

_____ partially blurred vision due to unequal curvature of cornea and/or lens

Answer 6

astigmatism

Question 7

_____ inability to focus on near objects due to poor elasticity of lens

Answer 7

presbyopia

Question 8

_____ medial turning of eyes while viewing close object

Answer 8

convergence

Question 9

_____ excessive fluid pressure in eye; may damage retina & optic nerve

Answer 9

glaucoma

Question 10

____ “cross-eyed”; weak muscle allows eye to rotate medially or laterally

Answer 10

strabismus

Question 11

____ fluid-filled area within eye that is anterior to the lens

Answer 11

anterior segment

Question 12

____ fluid-filled area within eye that is posterior to the lens

Answer 12

posterior segment

Question 13

____ fluid-filled area between the cornea and the iris

Answer 13

anterior chamber

Question 14

____ central, oval region of retina that contains mostly cones

Answer 14

macula lutea

Question 15

____ round central opening of iris

Answer 15

pupil

Question 16

____ fine fibers that extend from ciliary processes to the lens

Answer 16

ciliary zonule

Question 17

____ pigmented, anterior portion of vascular eye layer

Answer 17

iris

Question 18

____ fluid in the anterior segment of the eye

Answer 18

aqueous humor

Question 19

____ white, posterior portion of fibrous layer of the eye

Answer 19

Sclera

Question 20

____ where optic nerve exits the eye; no photoreceptors

Answer 20

optic disc

Question 21

____ drains aqueous humor from the eye

Answer 21

scleral venous sinus

Question 22

____ innermost layer of eye with photoreceptors

Answer 22

retina

Question 23

____ fluid in posterior segment of the eye

Answer 23

vitreous humor

Question 24

____ pigmented, posterior portion of vascular eye layer

Answer 24

choroid

Question 25

____ has only cones; provides high acuity color vision

Answer 25

fovea centralis

Question 26

____ form the aqueous humor via filtration

Answer 26

ciliary processes

Question 27

____ bulges anteriorly from junction with sclera; “window” of eye

Answer 27

cornea

Question 28

____ location of smooth muscle that changes lens shape

Answer 28

ciliary body

Question 29

____ location of smooth muscle that changes pupil diameter

Answer 29

iris

Question 30

____, ____, ____, ____ light-bending structures and fluids

Answer 30

cornea, lens, aqueous humor, vitreous humor