Chapter 2 The Eye

Question 1

Name all of the parts of the eye

Answer 1

Suspensoryligaments ,retina ,iris,cornea,pupil,lens,ciliary muscle,optic nerve

Question 2

What is the job of the cornea

Answer 2

Refracts light into the eye

Question 3

What is the job of the iris

Answer 3

To control how much light enters the pupil

Question 4

What is the job of the lens

Answer 4

Refracts light , focusing it onto the retina.

Question 5

What is the retina job

Answer 5

The retina is the light sensitive part and it is covered in receptors called ‘RODS’ and ‘CONES’ which detect light

Question 6

Rods are more sensitive in …

Answer 6

Dim light and can’t sense colour

Question 7

Cones are sensitive to different colours but aren’t good in ….

Answer 7

Dim light

Question 8

What do the suspensory ligaments and ciliary muscles do

Answer 8

They can contract or relax to change the shape of the lense meaning things are seen differently

Question 9

How can the lens cause long and short sightless

Answer 9

Because if it has bent the wrong way or wrong angle the light may not retract to the right position meaning things may become blurry .
This is becuase the image ( where the 2 retractions of light meet isn’t the eye must be at a certain point