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Ergonomics > Finals - (4) Visual Sense > Flashcards

Finals - (4) Visual Sense Flashcards

1
Q

what are 7 visual capabilities?

A

mobility, accommodation, adaptation, color discrimination and perception, visual acuity, contrast sensitivity, perception

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2
Q

what are the most rotational movements in mobility?

A

1.) left, right (yaw)
2.) up, down (pitch)
3.) roll
4.) forward, backward

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3
Q

it is the succession of fast movements in jumps to catch up to the visual target

A

saccades

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4
Q

what is the reverse movements?

A

regressions

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5
Q

in fixations, what is the area, measured in degrees within which the form and color of the objects can be seen by both fixated eyes?

A

visual field

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6
Q

it is the eye pitch angle with regard to the head

A

line-of-sight angle (LOSA)

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7
Q

what is the ability of the lens of the eyes to focus on targets at various distances?

A

accommodation

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8
Q

what are the distances that the ability of the lens of the eyes focus on?

A

normal focus, nearsighted focus, and farsighted focus

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9
Q

what is the ability of the eyes to change in the sensitivity to light?

A

adaptation

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10
Q

what are the 2 types of adaptation?

A

dark and light adaptation

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11
Q

in color discrimination, how do we determine the colors ?

A

chromaticity diagram

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12
Q

TRUE OR FALSE

Not all areas of the retina are equally sensitive to color

A

true

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13
Q

TRUE OR FALSE

we see colors while looking straight ahead and at the periphery of our visual field

A

false

we can’t see colors at the periphery of the visual field

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14
Q

what test is used to figure the degree of your visual impairment other than your eye shape, myopia, hyperopia, and astigmatism and is used as the basis to measure your correct vision?

A

refraction test

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15
Q

in color perception, what colors do we perceived with 50° to the side from straight ahead?

A

green, red, and yellow

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16
Q

in color perception, what color do we perceived with 60° to the side from straight ahead?

A

blue

17
Q

in color perception, what color do we perceived with 90° to the side from straight ahead?

A

white

18
Q

what are the 3 possible configurations of the human visual system?

A

monochromats, dichromats, trichromats

19
Q

what is the ability to discriminate the fine detail and differentiate small objects?

A

visual acuity

20
Q

what is the smallest space between the parts of a target that the eye can detect?

A

minimum separable acuity

21
Q

what is the ability to differentiate the lateral displacement of one line from another?

A

vernier acuity

22
Q

what is the ability to detect a spot (such as a round dot) from its background?

A

minimum perceptible acuity

23
Q

what is captured by the human eye and processed into an image by the brain?

A

light

24
Q

where do light rays passes through and through?

A

pupil, an opening in the eye, and through the cornea and lens

25
Q

it is composed of photosensitive receptors

A

retina

26
Q

this is sensitive to black and white, especially at night, but have poor visual acuity

A

rods

27
Q

this are sensitive to colors in daylight but have a good visual acuity

A

cones

28
Q

what part of the eye are concentrated in the fovea?

A

cones

29
Q

what part of the eye are spread out over the retina?

A

rods

30
Q

where do collected electrical signals from the photoreceptors passes by to go to the brain where the light from external illumination is processed and interpreted?

A

optic nerve

31
Q

the basic theory of illumination applies to a point source of light (e.g. candle) of a ?

A

luminous intensity, measured in candela (cd)

32
Q

what do you call the amount of light striking a surface or a section of a sphere?

A

illumination or illuminance, measured in footcandles (fc)

33
Q

the illuminance decreases as the light source increases

A

angle of incidence

34
Q

what is the amount of light reflected from the surface?

A

luminance

35
Q

this depends on the amount of light towards the surface, color, and texture of the surface

A

luminance

36
Q

luminance is measured in?

A

foot-lamberts (fl)

37
Q

luminance is determined by the reflective properties of the surface known as?

A

reflectance

38
Q

it is a unitless proportion that ranges from 0 to 100

A

reflectance

Ergonomics (9 decks)

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