Chapter 5

Question 1

The stimulus=

Answer 1

light

Question 2

The stimulus=

Answer 2

● Can only see between UV and Infrared waves (400-750ish nanometers)
● Blue light more damaging to eye than red light (blue light contains more energy)
○ Looking at blue light in the middle of the night will trick your brain into thinking the sun is coming out

Question 3

The stimulus=

Answer 3

● We probably see color the same (have same eye mechanisms) but no way of knowing
● We perceive things as being right side up, but things are upside down on the back of our
retina, haven’t found mechanism that flips things for us
○ We possibly see the world upside down but have lived with it for our whole lives
so its normal

Question 4

Cornea

Answer 4

outermost portion of eye, first structure that bends light, does most of the work
of focusing an image to your retina, one of few structures in human body that contains
no blood vessels (makes sense since you won’t be able to see if you did have vessels)

Question 5

Pupil

Answer 5

right behind cornea, a hole in your iris
○ Of interest in psych: pupil dilating when seeing something/one you enjoy

Question 6

Lens

Answer 6

focuses light on retina, don’t really need the lens
○ Works through accommodation
○ Peak resiliency at age 16
○ Is slightly tinted, blocking blue light
○ Yellow tint increases with age, making it challenging to see blue
■ Why some elderly women have blue hair (can’t see the blue)

Question 7

Vitreous humor

Answer 7

in vitreous chamber (bigger chamber), behind the lens, fills the entire
eye maintains structure of eyeball, jelly-like, have same fluid your entire life

Question 8

Aqueous humor

Answer 8

in front of the lens, make this new every 3 hours, important for cornea
(how it gets its nutrients)

Question 9

Glaucoma

Answer 9

dysfunction of aqueous humor fluid exchange

Question 10

Vision Pathways

Answer 10

● Right visual field analyzed by left visual cortex and vice versa
○ When looking straight ahead, stuff in right visual field crosses to left
○ Some stuff from both eyes crosses to other side and some stuff stays on same
side it is perceived on

Question 11

Nasal retina

Answer 11

: part of retina closest to nose, things perceived on this side cross over

Question 12

Temporal retina

Answer 12

part of retina closest to temporal lobe, things perceived on this
side stay on side it is perceived

Question 13

Transduction

Answer 13

● Changing on energy (light/electromagnetic light we see) into an AP
● Retina upside down in primates: light has to pass through 9 layers on retina to get to
layer where transduction occur, a technically bad designs that happens to work well for
us due to evolution

Question 14

Retina layers

Answer 14

10 but only going over 3