Eye Structures & Tests

Question 1

What does the cornea do?

Answer 1

Covers anterior part of eye/lets light into pupil

Question 2

What does sclera do?

Answer 2

White outermost layer of eye with strength and flexibility

Question 3

What does choroid do?

Answer 3

Middle layer of eye that provides nutrients via blood vessels

Question 4

What does iris do?

Answer 4

Color of eye/smooth muscle/regulates how much light goes in eye

Question 5

What does pupil do?

Answer 5

Opening of the eye through which light enters

Question 6

What does lens do?

Answer 6

Bends light to focus the image

Question 7

What does retina do?

Answer 7

Contains cones and rods/innermost layer of eye

Question 8

What does fovea do?

Answer 8

Provides highly detailed images/has cones only

Question 9

What does the optic disc do?

Answer 9

Blind spot of the eye

Question 10

What do cones see?

Answer 10

Colors (C in cones are same for C in color)

Question 11

What do rods see?

Answer 11

Black and White (R as in regular ink)

Question 12

To see a far image the lens does what?

Answer 12

Thickens

Question 13

To see a close image the lens does what?

Answer 13

Flattens

Question 14

When in bright light the pupil?

Answer 14

Constricts to limit the light

Question 15

When in dark light the pupil?

Answer 15

Dilates to allow more light in

Question 16

What is binocular vision?

Answer 16

Where both left and right eye sight overlap

Question 17

When you see an image how does your brain process it?

Answer 17

Upside down

Question 18

What is the liquid in between the cornea and pupil called?

Answer 18

Aqueous Humor

Question 19

What is the liquid behind the lens?

Answer 19

Vitreous humor

Question 20

Which liquid is more jelly-like?

Answer 20

Vitreous Humor

Question 21

What is perfect eyesight called?

Answer 21

Emmetropia

Question 22

What is near sighted called?

Answer 22

Myopia

Question 23

What is far sighted called?

Answer 23

Hyperopia

Question 24

In an eye diagram what happens to a person with myopia?

Answer 24

Meets shorter/before the retina

Question 25

In an eye diagram what happens to a person with hyperopia?

Answer 25

Meets longer/further than the retina

Question 26

Which shape is converging () or ɪ?

Answer 26

()

Question 27

Which shape is diverging () or ɪ?

Answer 27

ɪ

Question 28

What does the Snellen chart test for?

Answer 28

Visual Acuity

Question 29

What is Visual acuity?

Answer 29

How much detail a person can see

Question 30

What do the numbers on the top and bottom represent?

Answer 30

Top = distance a person is from the chart Bottom = distance a normal eye can see at top # distance

Question 31

What is the blind spot test for?

Answer 31

To find where light rays converge on optic disc

Question 32

What is the astigmatism chart for?

Answer 32

To test for astigmatism (strange shape of lens or cornea causing blurred vision, where lines of the chart would seem like one thick line)

Question 33

What does the peripheral vision test do?

Answer 33

Checks side vision

Question 34

What does the accommodation test do?

Answer 34

Checks to see lens movement to see far and near objects