The Eye and Vision

Question 1

Eyes are surrounded by _________ ______:

Answer 1

Protective Tissue

Question 2

The amount of light entering the eye is monitored by the ____:

Answer 2

Iris

Question 3

TRUE OR FALSE: If someone is missing one type of cone they are color blind

Answer 3

True

Question 4

Nearly __% of all the sensory receptors in your whole body are in the eyes

Answer 4

70%

Question 5

What is another name for Nearightedness?

Answer 5

Myopia

Question 6

Define Nearsightedness:

Answer 6

The point of focus falls in a spot in front of the Retina. Eye is too long and/or cornea is too steep.

Question 7

What is another name for Farsightedness:

Answer 7

Hyperopia

Question 8

Eyes are surrounded by _________ _____:

Answer 8

Protective Tissue

Question 9

The round walls around your eyes have 3 layers:

Answer 9

The Sclera, The Retina, and a middle layer that provides a rich blood supply

Question 10

Light enters through the “clear window” in the sclera

Answer 10

Cornea

Question 11

The amount of light entering the eye is monitored by the ____:

Answer 11

Iris

Question 12

How long is each eyeball?

Answer 12

Each eyeball is about an inch in diameter

Question 13

Can the cornea heal itself fast or slowly? If so how long does it take to heal ?

Answer 13

The Cornea heals itself fast, it takes one to two days

Question 14

Does the Cornea have blood supply?

Answer 14

No

Question 15

The Iris is made up of involuntary muscles that adjust the size of the pupil based on how much _____ __ ______ __ :

Answer 15

Light is coming in

Question 16

The Retina contains _____________ _____:

Answer 16

Photoreceptors cells

Question 17

Rods:

Answer 17

See dim light, gray tones , and motion

Question 18

Cones:

Answer 18

There are 3 types of cones each sensitive to a range of color

Question 19

What do eyeglasses do:

Answer 19

Can adjust how the light is bent when it enters your eyes

Question 20

What lens corrects nearsightedness:

Answer 20

Concave Lens

Question 21

What lens corrects farsightedness:

Answer 21

Convex lens

Question 22

FUN FACT <3:

Answer 22

Lenses of different shapes will bend the light to different degrees so the point of focus falls on the Retina

Question 23

We have photoreceptors over out entire Retina except in out ____ ____:

Answer 23

Blind Spot

Question 24

Blind Spot:

Answer 24

Is where the optic nerve leaves the eyeball, carrying signals to the occipital lobe

Question 25

TRUE OR FALSE: When light passes through the lens, it is bent by the lens and focused on the Retina

Answer 25

True

Question 26

The ____ focuses light entering the eye on the Retina:

Answer 26

Lens

Question 27

The muscles in the Iris do what to the pupil:

Answer 27

Contract and expand changing the size of the dark dot of your pupil

Question 28

Pupil:

Answer 28

The opening in the Iris that allows light to travel into the eye

Question 29

Iris:

Answer 29

Distinctive colored part of the eye that is uniquely yours and is made up of smooth muscles

Question 30

The eyes Photoreceptors:

Answer 30

Convert light energy into nerve impulses that the brain can understand

Question 31

Light:

Answer 31

Electromagnetic radiation traveling in waves

Question 32

Photoreceptors send signals to the brain through the _____ ____:

Answer 32

Optic Nerve