Unit C: Section 4.0

Question 1

What is the function of the cornea?

Answer 1

Protect all the sensitive parts of the eye

Question 2

What is the function of the iris?

Answer 2

To control the size of the pupil

Question 3

What is the function of the pupil?

Answer 3

To let in more or less light

Question 4

What is the function of the ciliary muscle?

Answer 4

To make the lens thicker or thinner

Question 5

What is the function of the lens?

Answer 5

To focus the light onto the retina

Question 6

What is the purpose of the retina?

Answer 6

To send the image to the optic nerve

Question 7

What is the function of the optic nerve?

Answer 7

To send the image to the brain

Question 8

What does it mean when the pupil dilates?

Answer 8

Becomes bigger

Question 9

Which part of the camera is like the retina?

Answer 9

The film

Question 10

What part of the camera is like the iris?

Answer 10

The diaphragm

Question 11

What part of the camera is like the eyelid?

Answer 11

The shutter

Question 12

What part of the camera is like the lens?

Answer 12

The lens!

Question 13

What part of the camera is like the pupil?

Answer 13

The aperture

Question 14

What is the retina?

Answer 14

It is the sensitive layer that like strikes. It is filled with photo receptors

Question 15

What are rods sensitive to?

Answer 15

Light

Question 16

What are cones sensitive to?

Answer 16

Color

Question 17

Why can’t you see colors in the dark?

Answer 17

Because comes don’t work very well in low light

Question 18

What happen when light strikes the retina?

Answer 18

The photoreceptors send light to the optic nerve

Question 19

What is farsightedness?

Answer 19

When the light doesn’t focus early enough

Question 20

What is nearsightedness?

Answer 20

When the light focuses to early

Question 21

How is farsightedness corrected?

Answer 21

It is fixed with convex lenses

Question 22

How is nearsightedness corrected?

Answer 22

It is fixed with concave lenses

Question 23

How does laser eye surgery work?

Answer 23

The surgeon uses a laser to reshape the cornea

Question 24

How do night vision goggles work?

Answer 24

Light goes through light intensifiers and then through a phosphor screen which causes them to glow green

Question 25

What are the parts of the eye?

Answer 25

``` Cornea Iris Pupil Lens Ciliary muscle Retina Optic nerve ```

Question 26

What are camera eyes?

Answer 26

Any eye that has a cornea, lens, and a retina

Question 27

How many comes do humans have?

Answer 27

3: each different ones sense red, green, blue

Question 28

How many different cones do birds have?

Answer 28

5

Question 29

What is tapetum lucidum?

Answer 29

It's basically a mirror inside the eye that reflects light outside of the eye

Question 30

What organisms have compound eyes?

Answer 30

Insects and crustaceans

Question 31

What is a compound eye?

Answer 31

Eyes that are made of many ommatidium

Question 32

What does an ommatidium look like?

Answer 32

A long tube with a lens on the outer surface

Question 33

What are advantages to compound eyes?

Answer 33

You can see in all directions | You can see motion very well

Question 34

What are downsides to compound eyes?

Answer 34

Can't form a single image

Question 35

What are camera eyes?

Answer 35

Any eye that has a cornea, lens, and a retina

Question 36

How many comes do humans have?

Answer 36

3: each different ones sense red, green, blue

Question 37

How many different cones do birds have?

Answer 37

5

Question 38

What is tapetum lucidum?

Answer 38

It's basically a mirror inside the eye that reflects light outside of the eye

Question 39

What organisms have compound eyes?

Answer 39

Insects and crustaceans

Question 40

What is a compound eye?

Answer 40

Eyes that are made of many ommatidium

Question 41

What does an ommatidium look like?

Answer 41

A long tube with a lens on the outer surface

Question 42

What are advantages to compound eyes?

Answer 42

You can see in all directions | You can see motion very well

Question 43

What are downsides to compound eyes?

Answer 43

Can't form a single image

Question 44

What is digital imaging?

Answer 44

The process of creating a big picture out of small images

Question 45

What happens when a computer receives an image?

Answer 45

It divides them into pixels and then changes it to numbers

Question 46

What does a computer do to tell color?

Answer 46

It assigns the color a number

Question 47

What is the resolution?

Answer 47

It refers to the number of pixels per unit area

Question 48

What is the difference between cameras and digital cameras?

Answer 48

Instead of light falling on agile it falls onto a charge-coupled device or CCD

Question 49

How does a charge coupled device work?

Answer 49

As light falls into each square it creates a small amount of electricity. It's then created into digital information like numbers