the Eye

Question 1

when focusing on near objects

Answer 1

Ciliary muscles contract
Suspensory ligaments are slack
Lens is thicker and more curved and refracts light more strongly

Question 2

When focusing on distant objects

Answer 2

Ciliary muscles relax
Suspensory ligaments are pulled tight
Lens is thinner and flatter and refracts light rays slightly

Question 3

Fiction of the iris

Answer 3

Colored part of eye
Muscles that relax and contract
Changed pupil size
Allows more or less light in

Question 4

Ciliary muscles function

Answer 4

Contract and repeat to change lens shape

Question 5

Cornea function

Answer 5

Transparent and curved lets lights in and changes its direction so it’s focuses on the retina

Question 6

Lens function

Answer 6

Sits behind the pupil and focuses light on retina

Question 7

Suspensory ligament

Answer 7

Tightens and slackens lens shape

Question 8

Optic nerve function

Answer 8

Nerve that connects eye to brain

Question 9

Sclera function

Answer 9

White layer that is tough which protects the eye

Question 10

Retina function

Answer 10

Layer of receptors at back of eye containing light sensitive cells (rods and cones)

Question 11

Myopia

Answer 11

Short sightedness
Rays of light focus in front of the retina
Concave lens

Question 12

Hyeropia

Answer 12

Long sightedness
Light focuses behind the retina
Corrected using a convex lens
Near objects are blurry

Question 13

Treatment of eye defects

Answer 13

Spectacle lens to refract rays to focus on retina
Hard and soft contact lenses
Laser eye surgery changes cornea shape
Replacement lens corrects defects permanently