Eye, vision

star goldstar goldstar goldstar goldstar greyFemaleMale
88 Questions - Developed by: V - Developed on: - 611 taken

  • 1
    - accommodation mechanism represents an activation of cones and inhibition of rods on the retina
     True
     False
  • 2
    -accommodation mechanism does not represent an activation of cones and inhibition of rods on the retina
     True
     False
  • 3
    - accommodation mechanism represents an activation of rods and inhibition of cones on the retina
     True
     False
  • 4
    - in myopic (short sighted) eye, light beams focused in front of retina; the defect is corrected by diverging lens
     True
     False
  • 5
    - in hypermetropic (far sighted) eye, light beams focused in front of retina; the defect is corrected by converging lens
     True
     False
  • 6
    - in hypermetropic (far sighted) eye, light beams focused behind the retina; the defect is
    corrected by diverging lens
     True
     False
  • 7
    - myopia (short sight) is corrected by diverging lenses
     True
     False
  • 8
    - myopia is spherical defect of eye, which means that it is different in horizontal and
    vertical directions
     True
     False
  • 9
    - hypermetropia (far sight) is spherical defect of eye, which means that it is different in
    horizontal and vertical directions
     True
     False
  • 10
    - presbyopia is kind of hypermetropia
     True
     False
  • 11
    - myopia is corrected by concave lenses
     True
     False
  • 12
    - myopia is corrected by convex lenses
     True
     False
  • 13
    - myopia is corrected by cylindrical lenses
     True
     False
  • 14
    - accommodation means the ability of eye to focus on (to perceive sharply) close objects
     True
     False
  • 15
    - accommodation means the ability of eye to change its optical power
     True
     False
  • 16
    - optical power of the cornea adjusts by a change of its curvature
     True
     False
  • 17
    - optical power of the cornea adjusts by a change of its distance from the retina
     True
     False
  • 18
    - optical power of human eyes is approx. 60 dioptres
     True
     False
  • 19
    - optical power of human eyes is approx. 90 dioptres
     True
     False
  • 20
    - optical power of human eyes is approx. 30 dioptres
     True
     False
  • 21
    - optical power can be expressed in cm-1
     True
     False
  • 22
    - optical power can be expressed in m-1
     True
     False
  • 23
    - astigmatism is spherical defect of eye, which means that it is different in horizontal and vertical directions
     True
     False
  • 24
    - astigmatism is colour defect
     True
     False
  • 25
    - astigmatism is corrected by concave lenses
     True
     False
  • 26
    - astigmatism is corrected by convex lenses
     True
     False
  • 27
    - astigmatism is corrected by cylindrical lenses
     True
     False
  • 28
    - hypermetropia is a monochromatic defect
     True
     False
  • 29
    - myopia is a monochromatic defect
     True
     False
  • 30
    - eye cornea is crucial for eye accommodation
     True
     False
  • 31
    - colour vision requires spectral decomposition of light in the eye
     True
     False
  • 32
    - colour vision does not require spectral decomposition of light in the eye
     True
     False
  • 33
    - rods and cones send their axons to the temporal lobe of brain (center of vision)
     True
     False
  • 34
    - eye retina contains mainly chemoreceptors
     True
     False
  • 35
    - retina comprises many layers of unipolar and ganglionic cells
     True
     False
  • 36
    - in the human retina the number of rods is higher than the number of cones
     True
     False
  • 37
    - in the human retina the number of cones is higher than the number of rods
     True
     False
  • 38
    - cones are more sensitive to light than the rods
     True
     False
  • 39
    - rods are less sensitive to light than the cones
     True
     False
  • 40
    - there are only cones in the macula lutea of retina providing “photopic“ vision
     True
     False
  • 41
    - there are only rods in the macula lutea of retina providing “photopic“ vision
     True
     False
  • 42
    - there are only rods in the blind spot of the retina
     True
     False
  • 43
    - there are only cones in the blind spot of the retina
     True
     False
  • 44
    - phototransmission is based upon absorption of photons by the photoreceptor pigment molecules
     True
     False
  • 45
    - absorption of light (photon) in the pigment results in alteration of the pigment molecule
     True
     False
  • 46
    - when the layer of ganglionic cells is injured (damaged) perception of light is mediated by fibers and action potentials directly from photoreceptors
     True
     False
  • 47
    - a primary response of photoreceptors to light stimulation is their hyperpolarization
     True
     False
  • 48
    - a primary response of photoreceptors to light stimulation is their depolarization
     True
     False
  • 49
    - after the excitation of photosensitive cells by light the ganglionic cells are depolarized
     True
     False
  • 50
    - after the excitation of photosensitive cells by light the ganglionic cells are hyperpolarized
     True
     False
  • 51
    - cones and rods contain different pigments
     True
     False
  • 52
    - different kind of cones contain different types of pigments
     True
     False
  • 53
    - an optic analyser consists of 3 parts: an eyeball, a retina, and a visual cortex
     True
     False
  • 54
    - we perceive a polychromatic light as a set (an assembly) of many colours
     True
     False
  • 55
    - cones provide perception of colours
     True
     False
  • 56
    - cones are not employed in the discrimination of colours
     True
     False
  • 57
    - rods provide perception of colours
     True
     False
  • 58
    - human eye discerns (distinguishes) approx. 150 colours (colour tones)
     True
     False
  • 59
    - human eye discerns (distinguishes) approx. 250 colours (colour tones)
     True
     False
  • 60
    - human eye discerns (distinguishes) approx. 350 colours (colour tones)
     True
     False
  • 61
    - deuteranomaly is just reduced ability of person to clearly perceive the green colour
     True
     False
  • 62
    - protanopy is the complete loss of ability to perceive the blue colour
     True
     False
  • 63
    - tritanomaly is aspheric defect in perception of the red colour
     True
     False
  • 64
    - tritanopy is lost ability to perceive the blue (and partially yellow) colour
     True
     False
  • 65
    - cataract occurs due to the damage of the eye lens disease
     True
     False
  • 66
    - miosis (reduced size of pupil) occurs when the intensity of light is higher
     True
     False
  • 67
    - meiosis occurs when the intensity of light is lower
     True
     False
  • 68
    - human eye can distinguish two points and perceive them separately if their images reach two different cones at the fovea centralis
     True
     False
  • 69
    - human eye can distinguish two points and perceive them separately if their images reach two different cones
     True
     False
  • 70
    - human eye can distinguish two points and perceive them separately if their images reach two different rods
     True
     False
  • 71
    - visual acuity (Visus) is a fraction (ratio) where a numerator represents the distance of correct reading of signs and a denominator represents the distance of eye examination
     True
     False
  • 72
    - visual acuity (Visus) is a fraction (ratio) where a numerator represents the distance of eye examination and a denominator represents the distance of correct reading of signs
     True
     False
  • 73
    - visual acuity is expressed as a Visus (V)
     True
     False
  • 74
    - visual acuity represents an ability of vision to distinguish two close points (minimum separabile) expressed e.g. as a magnitude of the angle between the light beams from those two points
     True
     False
  • 75
    - visual acuity is examined using Scheiner charts
     True
     False
  • 76
    - accommodation width represents the range of distances at which the eye can provide sharp (focused) vision, or the range of change of optical powers of the eye (in dioptres)
     True
     False
  • 77
    - accommodation width is always entirely determined by the measurement of near point (punctum proximum - PP)
     True
     False
  • 78
    - accommodation width is always entirely determined by the measurement of far point (punctum remotum - PR)
     True
     False
  • 79
    - near point (PP – punctum proximum) is the nearest distance at which the eyes can detect light
     True
     False
  • 80
    - far point (PR - punctum remotum) is the most distant point at which the eyes can detect light
     True
     False
  • 81
    - if PP = 6 D and PR = -2 D, the accommodation width is 8 D; this eye is hypermetropic
     True
     False
  • 82
    - if PP = 6 D and PR = -2 D, the accommodation width is 8 D; this eye is myopic
     True
     False
  • 83
    - if PP = 10 D and PR = 2 D, the accommodation width is 8 D; this eye is myopic
     True
     False
  • 84
    - Snellen types (symbols) are seen from appropriate distance at the angle of 1"
     True
     False
  • 85
    - Snellen types (symbols) are seen from appropriate distance at the angle of 5"
     True
     False
  • 86
    - Snellen types (symbols) are seen from appropriate distance at the angle of 1°
     True
     False
  • 87
    - Snellen types (symbols) are seen from appropriate distance at the angle of 5#
     True
     False
  • 88
    True
     True
     False

Comments page 0 of 0
Click here to add a comment
There are currently 0 comments to display.