Vision Flashcards

1
Q

what placement are horses eyes

A

lateral placement

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2
Q

where are the eyes located

A

upper portion of the head

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3
Q

what is the horses field of vision

A

wide field (almost 360 degrees)

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4
Q

what enhances motion detection

A

extended peripheral vision

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5
Q

how many degrees is binocular vision

A

55-65 of overap

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6
Q

how do horses use binocular vision to see

A

raise nose to increase range, lower head closer to objects

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7
Q

how many degrees is monocular vision

A

146 degrees either side

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8
Q

how do horses use monocular vision

A

extended peripheral vision enhances motion detection

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9
Q

what are the 4 blindspots

A
  1. between eyes
  2. 3-4 feet in front of legs
  3. behind the head all the way behind the tail
  4. under the chin all the way back
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10
Q

what affects changing the view

A
  1. head position
  2. head size and shape
  3. eye size and shape
  4. riders affect
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11
Q

an example of how head position affects changing the view

A

turning, tipping

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12
Q

an example of how eye size/shape affects changing the view

A

pig eyed

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13
Q

an example of how riders affect changing the view

A

head position

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14
Q

what is the shape of the pupil

A

large horizontal pupil

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15
Q

what gives the eye shade

A

corpora nigra

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16
Q

what is reflection of light

A

tapetum lucidum

17
Q

what word explains horse’s color vision

A

dichromatic

18
Q

how do horses see colors

A

two types of cone photoreceptors

19
Q

what can horses see (color vision)

A

colors, shades, hues, brightness

20
Q

what does the horizontal strip help with

A

visual clarity and change in head position

21
Q

what does the outside of the strip help with

A

motion dection

22
Q

what are topics in vision that are debated

A
  1. depth perception
  2. adjusting light to darkness
  3. which colors
  4. sharp or blurred
  5. farsighted or nearsighted
  6. interocular transfer (intelligence)