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S+P test 1 > vision 101 > Flashcards

vision 101 Flashcards

1
Q

light

A

stimulus for vision

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2
Q

wavelength

A

humans can see wavelengths of 400-700 nanometers

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3
Q

how is light seen

A

when it reflects off objects in the environment

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4
Q

Lens (parts of eye)

A

directly behind pupil. changes shape as you try to focus

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5
Q

pupil (parts of eye)

A

opening of eye that allows light to enter

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6
Q

iris (parts of eye)

A

color of your eye. allows pupil size to change

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7
Q

cornea (parts of eye)

A

transparent. covers front side of eye

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8
Q

fovea (parts of eye)

A

focal point in retina. only has cones. used to detect fine detail

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9
Q

retina (parts of eye)

A

back of eye, contains rods and cones.

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10
Q

cones

A

provide color vision and sharp detail

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11
Q

rods

A

Vision in dim light, detect movement

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12
Q

optic nerve (parts of eye)

A

transmits visual info to brain through the back of the eye

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13
Q

bipolar cells

A

combines impulses from retina and transmits to ganglion cells

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14
Q

ganglion cells

A

relay info from retina tp brain

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15
Q

horizontal cells

A

combines rods and cones and sends signals back to receptors to adjust to light and dark

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16
Q

amacrine cells

A

connects bipolar cells to ganglion. inhibitory neurons

17
Q

macular degeneration

A

progressively destroys macula. hard to see straight

18
Q

retinitus pigmentosa-

A

abnormalities in rods and cones. progressive vision loss in periphery

19
Q

blind spot

A

area where all the nerves leave the eye which leaves a blind spot with no cones or rods and that area is filled in with its surroundings

20
Q

dark adaption

A

cones and rods become more sensitive

pigment regenerates

21
Q

rhodopsin

A

helps see in dim lighting. when it sees light the pigment bleaches. found in rods

S+P test 1 (4 decks)

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