visual perception

Question 1

cornea

Answer 1

A transparent membrane that protects the front of the eye. refracts 95% of lgiht to help focus light inside the eye.

Question 2

aqueous humour

Answer 2

the watery fluid that helps maintain the shape of the eye, keeps it hydrated, oxygenated and get rids of waste.

Question 3

iris

Answer 3

coloured muscle that contracts and expands to control the size of the pupil, and let more/less light into the eye

Question 4

pupil

Answer 4

empty space/ the absence of the iris. Expands in low light conditions, retracts in high light conditions

Question 5

lens shape characteristics

Answer 5

transparent convex shape. located behind the iris, it changes shape to focus light on an image in the retina. cilliary muscles control changes to the shape

Question 6

what does lens do

Answer 6

focuses and bends light to focus it on the retina inverts the image we recieve but the brain turns it the right way up.
automatically contracts or relaxes depending on the distance. Bulges for closeness flattens for distance.

Question 7

virteous humour

Answer 7

jelly like substance to fill the space between the retina lining and the lens,

helps eyeball maintain shape

Question 8

RETINA

Answer 8

light sensitive membrane with layers of specialised neurons

at the back layer of the eye are rods and cones

Question 9

photo receptors

Answer 9

rods - night vision, low levels of light, poor at detecing detail, peripheral vision

cones - high levels of light, detects fine detail, colour vision

Question 10

blind spot

Answer 10

where the optic nerve meets the retina
theres no photo recpetiors no visual perception happens here

Question 11

optic nerve

Answer 11

carries visual information from the retina to the occipital lobe in the brain for processing.