Quiz 1

Question 1

Sensation

Answer 1

Activation of our 5 senses

Question 2

Perception

Answer 2

The putting together of information that we have in the physical world

Question 3

Computer vision

Answer 3

Computers take a really long time to learn

Question 4

Top down processing

Answer 4

Knowledge based (I know what a cat is)

Question 5

Bottom up processing

Answer 5

Data based / stimulus based (Is it soft? Does it have a tail?)

Question 6

Distal stimulus

Answer 6

Constant properties, 3D, real life object

Question 7

Proximal stimulus

Answer 7

Varying properties in size and shape, 2D, also flipped upside down

Question 8

Perception stimulus

Answer 8

Constant properties, what we see, 3D

Question 9

What light is visible to us?

Answer 9

400-700nm

Question 10

What are the 2 parameters of light?

Answer 10

Wavelength and intensity

Question 11

Cornea

Answer 11

bends light to point on retina (fixed focal lens that bends light the same amount)

Question 12

Lens

Answer 12

changes thickness and curvature based on distance

Question 13

Acommodation

Answer 13

Lens is thinner, less curved when looking far away. Lens is thicker, more curved when looking close.

Question 14

Myopia

Answer 14

Nearsightedness
Difficulty in focusing distant points

Question 15

Hyperopia

Answer 15

Difficulty in focusing at close distances

Question 16

Presbyopia (“old eye”)

Answer 16

Failure to accommodate, near point changes

Question 17

What are the eye diseases of the cornea?

Answer 17

Myopia and hyperopia, due to curvature of cornea

Astigmatism (main)

Question 18

Aqueous Humor

Answer 18

Clear substance between cornea and lens that provides nutrition and cushioning

Pressure, nutrients, clear debris, every four hours

Question 19

What is the disease involving the aqueous humor?

Answer 19

Glaucoma

Pressure in eye due to aqueous humor not draining correctly

Question 20

Iris

Answer 20

Muscle surrounding pupil

Question 21

Pupil

Answer 21

A gap that allows light into the eye

Question 22

Main disease caused by lens problems?

Answer 22

Cataracts: opacities in the lens

Question 23

Vitreous Humor

Answer 23

Provides nutrition and support to the eye

DOES NOT FLUSH

Question 24

Fovea

Answer 24

Center of retina that helps with detailed vision

Question 25

Photoreceptors

Answer 25

On the retina and contain photopigments that are sensitive to light

Question 26

Rods

Answer 26

120 million in each eye Very sensitive to light 500 x more sensitive than cones No cells in fovea High concentration in periphery No color

Question 27

Cones

Answer 27

Daytime system 6 million in each eye Fovea only has cones but most are outside the fovea Color vision

Question 28

Optic Disk

Answer 28

Region where optic nerve fibers exit the retina Blindspot; no receptors

Question 29

Dark adaptation

Answer 29

Increase in sensitivity to light that takes place as the eyes stay in the dark

Question 30

Photopic

Answer 30

day or well lit environment

Question 31

Mesopic

Answer 31

Dusk or dawn

Question 32

Scotopic

Answer 32

Night or dark

Question 33

Purkinje shift

Answer 33

Increased sensitivity to short wavelengths when switching from cones to rods

Question 34

Visual Acuity

Answer 34

At birth, vision is 20/500 Rapidly increases to 20/40 by 6 or 7 months old