Psych Ch. 6 Section 2

Front 1

Wavelength

Back 1

the distance between adjacent waves of radiant energy; in vision, mostly associated with perceptual dimension of hue

Front 2

Cornea

Back 2

Transparent tissue that covers the front of the eye

Front 3

Sclera

Back 3

The tough outer layer of the eye.

Hint 3

The “white” of the eye

Front 4

Iris

Back 4

consists of two bands of muscle that control light emitted into the eye, and the size of the pupil

Front 5

Aqueous humor

Back 5

- protects and cushions much of the eye

Front 6

Lens

Back 6

lies immediately behind the iris, causes image to focus on the back of the eye

Front 7

Accommodation

Back 7

the act in which muscles change the shape of the lense to adjust for short distances or long distances

Front 8

Retina

Back 8

internal surface of the eye, performs sensory functions of the eyes.

Front 9

Nearsighted

Back 9

eyes are too long

Front 10

Farsighted

Back 10

eyes are too short

Front 11

Photoreceptors

Back 11

specialized neurons that transduces light into nueral activity

Front 12

Optic disk

Back 12

circular region of the retina where axons and ganglion cells exit the eye and form an optic nerve

Front 13

Bipolar cells

Back 13

transmitter substance receives from photoreceptors and passes to gonglion

Front 14

Three Cell chain to the brain

Back 14

photoreceptor> bipolar cell> ganglion cell> brain

Front 15

Rods

Back 15

function in dim light, insensitive to colors

Front 16

Cones

Back 16

need light for vision, function in color

Front 17

Fovea

Back 17

small pit that contains only cones, responsible for our detailed eyesight

Front 18

Photopigment

Back 18

two molecules combined together, when struck by photons it splits and sends a signal. The brighter the light the more bleached it is.

Front 19

Rhodopsin

Back 19

photopigment for rods, pink

Front 20

Dark adaptation

Back 20

adapting to the dark

Front 21

Conjugate movements

Back 21

both eyes focused on the same object, assist perception of distance

Front 22

Saccadic movements

Back 22

shift glaze abruptly from one point to the other, help us remember the spatial relationships between objects

Front 23

Pursuit movements

Back 23

track moving objects

Front 24

Hue

Back 24

determined by the wavelength

Front 25

Brightness

Back 25

determined by intensity of radiant energy emited by visual stimulus

Front 26

Saturation

Back 26

purity,

Hint 26

white light is completely desaturated

Front 27

Color mixing

Back 27

the addition of wavelegths

Front 28

Trichromatic theory

Back 28

theory that color vision is created by three main types of photoreceptors that are sensitive to specific wavelengths

Front 29

Opponent Process

Back 29

The representation of colors by the rate of firing two types of neurons: red/green and yellow/blue

Front 30

Negative afterimage

Back 30

The image seen after a portion of the retina is exposed to an intense visual stimulus; it consists of colors complementary to those of the original stimulus.

Front 31

Protanopia

Back 31

a form of hereditary anomalous color vision caused by defective “red” cones in the retina.

Front 32

Deuternapia

Back 32

Green cones are filed with red photopigment

Front 33

Tritanopia

Back 33

sees the world in green and reds