Psychology Ch 4.2 THE EYE

studied byStudied by 4 people
4.0(1)
Get a hint
Hint

Physical properties of light and related perceptions

1 / 27

flashcard set

Earn XP

Description and Tags

28 Terms

1

Physical properties of light and related perceptions

Wavelength - hue (colour) Amplitude - Brightness Purity - Saturation

New cards
2

Cornea

Focuses light so we can see clearly

New cards
3

Pupil

Lets light in

New cards
4

Iris

Controls amount of light that comes in, it controls the pupils to contract or expand

New cards
5

Lens

Allows eyes to focus on stimuli on various distances

New cards
6

Retina

Where the sensory receptors are located, visual stimuli comes in and transforms into neuro impulses

New cards
7

Fovea

Responsible for sharp central vision

New cards
8

Optic disk (blind spot)

Exit point for the ganglion access cells

New cards
9

Optic nerve

Bundle of neurons

New cards
10

Nearsightedness

Lens of eye makes visual image bend before the fovea, can't see clearly thats far away

New cards
11

Farsightedness

Can't focus on close things, visual image lands after fovea

New cards
12

Astigmatism

Bending of light between cornea and lens

New cards
13

Bipolar cells

a type of neuron that has two extensions (one axon and one dendrite). Many bipolar cells are specialized sensory neurons for the transmission of sense. As such, they are part of the sensory pathways for smell, sight, taste, hearing, touch, balance and proprioception.

New cards
14

Amacrine cell

the first neurons in the visual system to fire action potentials, and also the first to generate transient responses.

New cards
15

Ganglion cell

the projection neurons of the vertebrate retina, conveying information from other retinal neurons to the rest of the brain

New cards
16

Rods

Sensitive to light and dark Low delta More on the periphery of retina

New cards
17

Cones

Process colour High detail More in fovea

New cards
18

Ganglion cells

Sensitive to blue wavelengths Circadian rhythms

New cards
19

Normal changes in vision while aging

Need more light, difficulty seeing colours, presbyopia

New cards
20

Presbyopia

  • Loss of elasticity in lens and muscles that control it

  • Age related “farsightedness”

New cards
21

macular degeneration

Due to thinning of macula 10% of people get this aged 66 - 74 30% of people get this aged 75 - 85

New cards
22

Cataracts

Clouding of eye (makes image blurry) Treatment couching (lens is dislodged) 51% of world blindness Intraocular lens

New cards
23

Glaucoma

Pressure on optic nerve (fluid pressure) Progressive damage Second leading cause of blindness

New cards
24

Dorsal stream

The where/how pathway Occipital -> parietal Important for spatial understanding, gilding actions

New cards
25

Ventral stream

The what pathway Occipital -> temporal Important for object recognition, visual agnosia (perceive objects, understand what they are), face recognition (prosopagnosia) Perceptual constancy

New cards
26

Perceptual constancy

Familiar objects keep their shape, size and colour regardless of the sensory input changes Ex) changes in angle, distancing and lightning

New cards
27

Binocular cues (need both eyes)

Our eyes can see slightly different views Retinal disparity Convergence Depth perception

New cards
28

Monocular Cues

Linear perspectives (traintracks) Texture gradients (more detail the closer you get) Interposition Relative size Height in plane Light and shadow (the way light hits an object) Motion parallax (things coming to us that are close seem like they’re coming faster than things from afar)

New cards

Explore top notes

note Note
studied byStudied by 64 people
... ago
5.0(2)
note Note
studied byStudied by 3 people
... ago
5.0(1)
note Note
studied byStudied by 2 people
... ago
5.0(1)
note Note
studied byStudied by 80 people
... ago
5.0(2)
note Note
studied byStudied by 43 people
... ago
5.0(1)
note Note
studied byStudied by 20 people
... ago
4.0(1)
note Note
studied byStudied by 52 people
... ago
5.0(2)
note Note
studied byStudied by 17 people
... ago
5.0(2)

Explore top flashcards

flashcards Flashcard (104)
studied byStudied by 32 people
... ago
5.0(1)
flashcards Flashcard (47)
studied byStudied by 2 people
... ago
5.0(1)
flashcards Flashcard (105)
studied byStudied by 21 people
... ago
4.0(1)
flashcards Flashcard (42)
studied byStudied by 49 people
... ago
5.0(1)
flashcards Flashcard (50)
studied byStudied by 16 people
... ago
5.0(2)
flashcards Flashcard (26)
studied byStudied by 6 people
... ago
5.0(1)
flashcards Flashcard (169)
studied byStudied by 14 people
... ago
5.0(1)
flashcards Flashcard (25)
studied byStudied by 18 people
... ago
5.0(2)
robot