Science Test - Eyes

Question 1

Pupil

Answer 1

The hole in the iris that light passes through to reach the retina

Question 2

Muscles

Answer 2

Allows the eye to move which provides vision in various directions

Question 3

Optic nerve

Answer 3

Carries nerve signals to the brain. Tubelike structure on the back of the eyeball

Question 4

Sclera

Answer 4

Tough white outer layer. Six muscles are attached to it in order to move the eye up and down, side to side. Protects the eye

Question 5

Choroid

Answer 5

A layer found between the sclera and the retina that contains many blood vessels which bring nutrients and Oxygen to the eye and removes wastes.

Question 6

Retina

Answer 6

Where the image is produced. The light sensitive layer on the inside of the eye. Has many vessels and nerves. Types of light receptor cells called rodes and cones.

Question 7

Vitreous humour

Answer 7

A jelly like fluid found in the centre of the eye witch helps maintain the eyes shape and plays a small role in focusing light on the retina

Question 8

Lens

Answer 8

Helps focus light on the retina. A lens behind the iris

Question 9

Cornea

Answer 9

Helps focus light on the retina. Outside layer infront of the iris

Question 10

Aqueous humour

Answer 10

A watery fluid found between the cornea and iris and maintains the shape of the front of eye and plays a small role in Focusing light.

Question 11

Blind spot

Answer 11

The area where the optic nerve and nerve cells blood vessels connect to the retina. There are no rods or cones

Question 12

Collard muscles

Answer 12

Controls the thickness of the lens,To adjust for near and far objects

Question 13

Suspensions ligaments

Answer 13

Attached the ciliary muscles to the lens which allow the lens the change shape and focus light on the retina

Question 14

Rods

Answer 14

1 of the types of light receptors. 120 million rods in the eyes. They are sensitive to the level of light. They can detect dim light. They allow us to see during the night and in other dark conditions

Question 15

Cones

Answer 15

1 of the types of light receptors. 6 million cones in the eyes. They are sensitive to coulor. Detect bright light and allow us to see coulor and detail during the day, and other bright conditions

Question 16

Iris

Answer 16

The area where the image is produced and converted controls how much light goes in your eye. It’s a muscle, makes your eye bigger in dim light and smaller in lighter light

Question 17

Fat

Answer 17

A layer surrounding the eye ball, cushions and protects it