Vision

Question 1

amplitude

Answer 1

• height of wave
• higher is brighter
• lower is duller

Question 2

wavelength

Answer 2

• higher wavelength is a lower frequency

- lower wavelength is a higher frequency

Question 3

purity

Answer 3

impacts the % of saturation or richness of colours

Question 4

pure light

Answer 4

light made up from one wave length

Question 5

natural light

Answer 5

light made up of multiple wave lengths

Question 6

lights trhough the eye

Answer 6

1) cornea
2) pupil
3) iris
4) lens
5) vitreous humour
6) retina

Question 7

cornea

Answer 7

transparent window at front of the eye

responsible for ~80% of focusing power

Question 8

pupil

Answer 8

round window in middle of eye (black dot)

Question 9

iris

Answer 9

controls size of pupil
if dim out dilates
if bright out contracts

Question 10

lens

Answer 10

final focusing of light
project image onto retina
is curved

Question 11

curved lens

Answer 11

project image upside down and backwards onto retina, brain compensates

Question 12

flexible lens

Answer 12

close object:lens get rounder

far object: lens elongates

Question 13

vitreous humour

Answer 13

clear jelly

holds eye together

Question 14

retina

Answer 14

made of 3 layer
1) photoreceptors
2 & 3) horizontal and amacrine cells

photoreceptors beside retinal pigment epithelium because it is its energy source

Question 15

cones

Answer 15

6 million
used for day vision
allow to see colour
good visual acuity
concentrated toward fovea

Question 16

rods

Answer 16

125 million 
periphery vision
used for night vision
provide no colour info
poor visual acuity

Question 17

neural signals pathway

Answer 17

photoreceptors > bipolar cells > ganglion cells

Question 18

blind spot

Answer 18

due to lack of photo receptora on the optic disc

Question 19

cones grouping

Answer 19

direct connection to brain

high visual acuity

Question 20

rods grouping

Answer 20

less direct connection to brain

lower visual acuity

Question 21

left brain gets infor from

Answer 21

right nasal retina

left temporal retina

Question 22

right brain gets info from

Answer 22

left nasal retina

right temporal retina

Question 23

main pathway

Answer 23

most axons synapse in the LGN

Question 24

primary visual cortex

Answer 24

V1

in occipital lobe

Question 25

extrastriate cortex

Answer 25

visual processing area in the occipital lobe

Question 26

visual info pathway

Answer 26

ganglion to 1 LGN

many LGN to 1 V1 cell

Question 27

dorsal stream

Answer 27

where

parietal

Question 28

ventral stream

Answer 28

what

temporal

Question 29

light sensitive path

Answer 29

jelly fish and worms

Question 30

curved “cup” eye

Answer 30

allow direction of light to be sensed

Question 31

crude lens

Answer 31

allowing input from stimulus from different distances

Question 32

compound eye

Answer 32

good at detecting movement close up

Question 33

simple eye

Answer 33

differ depending on enviroment

Question 34

large eyes

Answer 34

can benefit eith acuity or night acuity

Question 35

lateral eyes

Answer 35

prey

bad depth perception

Question 36

forward eyes

Answer 36

predator

increased depth perception

Question 37

eye development

Answer 37

2 month prenatul: eyes form
6 months prenatul: react to light
random firing determines how cells will connect
newborn: weak lens muscles
3 months old: almost adult like focus
11 years: visual brain area full developed

Question 38

visual acuity development

Answer 38

birth (20/600)
6 months (20/100)
4-6 years (fully reach acuity)

Question 39

man who only shaved half face, ate half plate of food

Answer 39

NOT VISUAL DEFECIT
attention issue
parietal lobe damage

Question 40

brain assumes _____ light source

Answer 40

one

Question 41

blind people can

Answer 41

still show emotional and action blind spot

Question 42

sclera

Answer 42

a tough structural membrane that covers to portion of the eye not covered by the cornea