The Structure Of The Eye

Question 1

What is the purpose of the eyelid

Answer 1

It clean and protects the eye. It i a fold of skin which covers the eye

Question 2

What is the purpose of the cornea

Answer 2

It protects the eye; helping converge light rays that enter the eye. It is the the transparent covering the eye

Question 3

What is the purpose of the sclera

Answer 3

Provides protection and support to the eye. It is the white part of the eye made from tough collagen fibres

Question 4

What is the purpose of the retina

Answer 4

It detects light rays that are focused by cornea and lens. A layer of light sensitive cells at the back of the eye

Question 5

What is the purpose of the choroid

Answer 5

Nourishes the eye and absorbs light.It is a layer of blood vessels with a black pigment

Question 6

What is the purpose of the iris

Answer 6

Controls the amount of light entering the eye. It’s a ring of muscles around the pupil, coloured which provides eye colour 

Question 7

The purpose of the pupil

Answer 7

Allows light to enter the eye. It is the Hole in the middle of the iris

Question 8

Purpose of the lens

Answer 8

Focus is the light on to the retina and focusing on objects. It is transparent, flexible and can change shape due to the ciliary muscles

Question 9

Purpose of the ciliary body

Answer 9

Produces aqueous humour and helping with focusing by altering the shape of the lens. It is attached to the underside of the lens

Question 10

What Is the purpose of the vitreous humour

Answer 10

Gives eyeballs it shape. Located behind the lens

Question 11

What is the purpose of the Aqueous humour

Answer 11

Helps keep the eyes rounded shape; providing nutrients to the cornea and lens. It is found behind the cornea

Question 12

What is the purpose of the lateral rectus muscles

Answer 12

They help orientate the pupil away from the centre of the body. Found on the lateral side of the eye

Question 13

What is the purpose of the medial rectus muscle

Answer 13

Helps orientate the pupil towards the center of the body. Found on the medial side of the eye

Question 14

Is the purpose of the fovea

Answer 14

Helps give sharp central vision; light is focused on to the spot by the lens. Located in a macular which has a high density of cone cells

Question 15

Is the purpose of the optic disc

Answer 15

Where the optic nerve leaves the eye. It is found in the blindspot where there are no photoreceptors

Question 16

The purpose of the optic nerve

Answer 16

It relates information from the retina and fovea to the brain. Found in bundle of fibres