Vision

Question 1

wavelength

Answer 1

distance from one peak to another

determines hue

Question 2

lens

Answer 2

transparent structure behind pupil, changes shape to help focus images on retina

Question 3

accommadation

Answer 3

process of lens changing shape to focus near or far objects on retina

nearsightedness/farsightness can result

Question 4

retina

Answer 4

light sensitive inner surface of eye

Question 5

rods

Answer 5

• retina’s periphery
• recieves energy in low light
• unable to detect color

black/white, perpherial vision

Question 6

cones

Answer 6

• concentrated in middle of retina (fovea)
• detect color in brighter light
• acuity

color, fine detail

Question 7

adaptation to dark

Answer 7

pupils dilate to allow more light
20 mins

Question 8

optic nerve

Answer 8

carries neural impulses from eye to brain

Question 9

blind spot

Answer 9

where optic nerve leaves the eye

Question 10

primary visual cortex

Answer 10

• visual input processed here
• occipital lobe
• damage can cause face blindness/blindsight

face blindness = prosopagnosia

Question 11

trichromatic theory

Answer 11

• 3 types of cones respond to red, blue, green
• other colors percieved thru mixing of signals from cones

how colors detected in retina

Question 12

opponent process theory

Answer 12

3 types of cells control perception of color
* red green
* yellow-blue
* white-black
cells only detect one color at a time bc colors oppose each other

how colors processed in brain
lead to afterimages

Question 13

dichromatism/
monochromatism

Answer 13

damage to one or more cones/ganglion cells