Vision and the Eye - Exam #2

Question 1

What is the organ for vision?

Answer 1

The eye!

Question 2

What is our most important sense? (or at least one of our greatest)

Answer 2

Vision!

Question 3

Why is Vision (one of our) greatest sense(s)?

Answer 3

Our Sensation and Perception would be greatly diminished without it

Question 4

How much of the information we get about the world comes from our Visual System?

Answer 4

80%!

Question 5

What % of sensory receptors is in our retinas?

Answer 5

70%!

Question 6

What is the stimulus for vision?

Answer 6

Electromagnetic energy

Question 7

What part of electromagnetic energy can our visual system really use?

Answer 7

The visible spectrum (colors!)

Question 8

Define Transduction

Answer 8

XXXXXXXXXXXXXX

Question 9

What is the function of the eye?

Answer 9

To focus electromagnetic energy into an image, transduce it into a neural signal, and then start processing this signal

Question 10

What does the eye focus electromagnetic energy into?

Answer 10

Something useable like a picture/image

Question 11

Where are predator’s eyes? What is this called?

Answer 11

Together and in front; Centrally positioned eyes

Question 12

What is the benefit of Centrally Positioned eyes?

Answer 12

It maximizes binocular depth perception

Question 13

Why is it helpful for predators specifically to have Centrally Positioned eyes?

Answer 13

They can determine how far to go and how to lunge to catch their prey

Question 14

Why do Centrally Positioned eyes give depth perception?

Answer 14

It causes a great overlap of vision of the two eyes

Question 15

What is the downside of having Centrally Positioned eyes?

Answer 15

It leaves a blind spot at the back of our heads

Question 16

How many eyes does a mammal have? Are they always in the same place?

Answer 16

Two! No! Can be in different places!

Question 17

What are the two type of mammalian eye placements?

Answer 17

Lateralized eyes and Centrally Positioned eyes

Question 18

What is the prey eye placement called for mammals?

Answer 18

Lateralized eyes

Question 19

What is the benefit of having Lateralized eyes?

Answer 19

They can see in 360 degrees (all around them)

Question 20

What is the benefit for prey specifically to have lateralized eyes?

Answer 20

They can easily see when a predator is approaching

Question 21

What is a field of view? (A “FOV”)

Answer 21

The area that someone or something can see

Question 22

What kind of mammal has the biggest FOV?

Answer 22

Prey!

Question 23

Why do prey animals have a bigger FOV? (Field of View)

Answer 23

They have Lateralized eyes! On the sides of their head!

Question 24

What is Binocular View?

Answer 24

XXXXXXXXXXXXXXXXX The overlap space/vision of the two eyes

Question 25

What is Binocular View helpful for?

Answer 25

Depth Perception

Question 26

Who has a lot of Binocular View?

Answer 26

Humans (us!) and primates

Question 27

Why do humans (and primates) have a large amount of Binocular View?

Answer 27

We look in front of ourselves a lot and we evolved tools

Question 28

What effect did evolving tools have on humans and primates? Why?

Answer 28

It caused us to have more Binocular Vision because we needed more distinctions to use tools

Question 29

What is special about human vision?

Answer 29

We have more Binocular vision, more of a blind spot(behind us), less peripheral vision than front-eyed animals

Question 30

Why is our Binocular Vision much more specialized?

Answer 30

We evolved and used tools quite a bit!

Question 31

XXXXXXXXXWhy might having a bigger blind spot behind us be problematic?

Answer 31

We can't see predators approaching from behind!

Question 32

What is the Pupil of the eye? (as far as where/what it is in the structure of our eye)

Answer 32

It's the black spot in the middle of our eye/Iris

Question 33

What is the Iris of the eye? (as far as where/what it is in the structure of our eye)

Answer 33

It's the colored bit that surrounds the pupil/black thing

Question 34

What is the Sclera of the eye? (as far as where/what it is in the structure of our eye)

Answer 34

It's the white portion of our eye surrounding our Iris and Pupil

Question 35

What shape is the eyeball?

Answer 35

Globe/roundish

Question 36

What is the eye enclosed by? (vauge)

Answer 36

Three membranes

Question 37

What are the names of the three membranes that the eye is enclosed by?

Answer 37

The Fibrous Tunic, the Vascular Tunis, and the Retina

Question 38

What is the outermost membrane that encloses our eye?

Answer 38

The Fibrous Tunic

Question 39

What is the middle membrane that encloses our eye?

Answer 39

The Vascular Tunic

Question 40

What is the inner membrane that encloses our eye?

Answer 40

The Retina