Eye

Question 1

Focal point

Answer 1

A place where light rays meet after refraction

Question 2

Your sight

Answer 2

Relies on light entering the eye from the environment and being collected by the light sensitive receptor

Question 3

What do light rays do?

Answer 3

Reflect off everything you see

Question 4

Sclera

Answer 4

Tough white outer layer, front

Question 5

Cornea

Answer 5

The layer of fluid, on the top of the eye

Question 6

Iris

Answer 6

The coloured part of the eye

Question 7

Suspensory ligaments

Answer 7

Hold the lens

Question 8

Ciliary muscles

Answer 8

Pull on the sensory ligaments, move the lens

Question 9

Retina

Answer 9

The light sensitive part of the eye, contains lots of receptors

Question 10

Optic nerve

Answer 10

Send electrical impulses to the brain

Question 11

Blind spot

Answer 11

Only place where it doesn’t contain any retina cells

Question 12

Lens

Answer 12

Focuses the light that enters the eye to give clear vision.

Question 13

Near objects- ciliary muscles

Answer 13

Contract

Question 14

Suspensory ligaments- near objects

Answer 14

Loosen

Question 15

Near objects- Lens

Answer 15

Gets thicker and refracts more strongly

Question 16

Ciliary muscles- distant objects

Answer 16

Muscle relaxes

Question 17

Suspensory ligaments- distant objects

Answer 17

Ligaments tighten

Question 18

Lens- distant objects

Answer 18

Lens pulls thin and refracts only slightly

Question 19

Short sighted

Answer 19

People’s near vision is usually clear, they should have a concaved lens.

Question 20

Long sighted

Answer 20

Light that comes into your eye is focused behind the retina rather than on it- eyes have to work hard to re-focus, therefore needing a comvexed lens

Question 21

Short sighted Symptoms

Answer 21

Objects in the distance are blurred, close objects are usually clear, headaches, eyestrain

Question 22

Long sighted symptoms

Answer 22

Blurred vision when looking in the distance, especially when looking at close objects, headaches

Question 23

Convexed lens

Answer 23

Help people see further away and makes the light converge before the retina- without the lens the light would converge before the retina.

Question 24

Lasik laser eye surgery

Answer 24

done with two lasers, one to open up a flap in the cornea, it is removed so the surgeon can reshape your cornea-

Question 25

Smile

Answer 25

Surgeon reshapes your cornea through a small, self sealing hole.

Question 26

Surface laser treatments

Answer 26

The Clear skin covering the cornea is removed so the surgeon can reshape your cornea- skins grows back naturally.