Lecture 3.2

Question 1

Visible spectrum=

Answer 1

White light

Question 2

What is the visible spectrum range

Answer 2

380 nanometres to 760 nm

Question 3

Colour of light is determined by…

Answer 3

Hue, brightness and saturation

Question 4

Describe the layers of the eye

Answer 4

Cornea-Lens(focuses image)-Retina (back of the eye)

Filled with vitreous humour

Question 5

What are the light sensitive cells in the retina called?

Answer 5

Rods and cones

Question 6

Describe cones

Answer 6

Less cones then rods, fine detail, daylight, concentrated within the fovea, responsible for our ability to see colour

Question 7

Describe rods

Answer 7

Can not discriminate fine detail, night vision, more sensitive to light than cones

Question 8

Name the three layers of the retina

Answer 8

Photoreceptor-Bipolar-Ganglion

Question 9

Describe the three types of cones

Answer 9

S (blue light), M (green light) and L(red light) cones

Question 10

Describe the path of the optic nerves

Answer 10

Come from the retinal ganglion cells, the optic nerve moves towards the optic chiasm. Half the axons cross to the other side of the brain. These axons continue to the LGN and the onto the primary visual cortex

Question 11

What is observed in the primary visual cortex in each hemisphere in terms of visual information

Answer 11

The other half of the visual field not the other eye *