Human Eye

Question 1

What does the cornea do

Answer 1

Outside covering that protects the eye, focuses light rays

Question 2

What does the pupil do

Answer 2

Controls the amount of light that enters the eye.
Expands to let in more light, contracts to let in less

Question 3

What does the lens do

Answer 3

Transparent structure behind the pupil to help focus light rays onto retina

Question 4

What does the Retina do

Answer 4

Receives and absorbs light
Processes images, has to get to retina to be processed

Question 5

Sclera

Answer 5

Is a layer of connective tissue that protects the eye and makes the white of the eye and cornea

Question 6

Choroid

Answer 6

Thin middle layer of the eye
- Absorbs excess light to prevent blurred vision
-Forms the iris

Question 7

Rods in the retina

Answer 7

there are 125 million Rods are in the retina, they
-respond to low levels of light
-primarily involved in night vision
-not involved in colour vision
-poor at detecting fine details

Question 8

Cones in the retina

Answer 8

there are 6-7 million cones in the retina, they
-respond to high levels of light
-best in well lit conditions
-colour vision
-fine details