Parts Of The Eye

Question 1

Cornea

Answer 1

The transparent front part of the eye that refracts light to help it focus onto the retina.

Question 2

Iris

Answer 2

The coloured part of the eye that controls the size of the pupil and thus regulates the amount of light entering the eye.

Question 3

Pupil

Answer 3

The hole in the centre of the iris. It size changes depending on the light intensity (smaller in bright light, larger in dim light).

Question 4

Lens

Answer 4

A transparent flexible structure that fine-tunes the focus of light onto the retina by changing shape.

Question 5

Retina

Answer 5

The light sensitive layer at the back of the eye that contains rods and cones. It converts light into electrical impulses.

Question 6

Rods

Answer 6

Photoreceptor cell that detect light intensity; works best in low light

Question 7

Cones

Answer 7

Photoreceptor cells that detect colour; works best in bright light

Question 8

Optic nerve

Answer 8

Carries electrical impulses from the retina to the brain

Question 9

Suspensory ligaments

Answer 9

Connect the lens to the ciliary muscle and help hold the lens in place

Question 10

Ciliary muscles

Answer 10

Contracts or relaxes to change the shape of the lens for focusing on near or far objects

Question 11

Sclera

Answer 11

The tough white outer layer that protects the eye and helps maintain its shape.

Question 12

Vitreous humour

Answer 12

The jelly-like substance that fills the main chamber of the eye, helping it keep its shape and hold the retina in place.

Question 13

Blind spot

Answer 13

The point where the optic nerve leaves the eye, there are no photoreceptors here, so it’s insensitive to light.