Color Vision Ch.8 Flashcards

1
Q

peak sensitivity for S cones

A

425 nm

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2
Q

peak sensitivity for M cones

A

530 nm

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3
Q

peak sensitivity for L cones

A

560 nm

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4
Q

ratio of L: M: S cones

A

10L : 5M : 1S

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5
Q

___ % of males have some form of CVD

A

about 8%

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6
Q

definition of anomalous trichromats

A
  • 3 one photopigments

- 1 of the photopigments is “different” than normal

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7
Q

prevalence of anomalous trichromats

A

~6% males

<0.4% females

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8
Q

SWS anomalous trichromacy is called

A

tritanomaly

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9
Q

MWS anaomalous trichromacy is called

A

deuteranomaly

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10
Q

prevalence of deuteranomaly (DA)

A

5% of males

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11
Q

prevalence of protanomaly (PA)

A

1% of males

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12
Q

definition of dichromats

A
  • 2 cone photopigments

- 1 of the photopigments is missing

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13
Q

prevalence of dichromats

A

2% of males

<0.2% of females

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14
Q

dichromat with SWS missing

A

tritanopia

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15
Q

dichromat with MWS missing

A

deutranopia

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16
Q

prevalence of deuteranopia

A

1% of males

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17
Q

dichromate with LWS missing

A

protanopia

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18
Q

prevalence of protanopia

A

1% of males

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19
Q

how does the action spectrum shift in anomalous trichromats?

A

affected photopigment’s action spectrum is shifted toward the other ‘normal’ photopigment

20
Q

dichromats: SWS is coded for on what chromosome?

A

chromosome 7

21
Q

what inheritance pattern is for blue-yellow deficiency (SWS)?

A

autosomal dominant (AD)

22
Q

dichromats: MWS/LWS coded for on what chromosome?

A

on the X-chromosome

23
Q

what inheritance pattern is for red-green deficiency (MWS/LWS)?

A

x-linked recessive (XLR)

24
Q

prevalence of rod monochromats?

A

< 1 in 30,000

25
rod monochromats have what inheritance pattern and what chromosome involved?
chromosome 2, autosomal recessive (AR)
26
what type of CVDs have neutral points
only dichromate have confusion lines, copunctal points, and neutral points
27
confusion lines represent:
colors that cannot be discriminated by dichromate
28
what is the copunctal (convergence) point?
point where confusion lines converge
29
what is the neutral point?
point on spectral locus, on a confusion line going through white and the copunctal point
30
for dichromat type protanopia, what is the neutral point?
495
31
for dichromat type deuteranopia, what is the neutral point?
about 500
32
for dichromat type tritanopia, what is the neutral point?
570
33
protanopia mixes white with what color?
blue-green (cyan)
34
deuteranopia mixes white with what color?
green
35
tritanopia mixes white with what color?
yellow
36
color normal people have their best wavelength discrimination at:
490nm and 590nm
37
color normal people (at their best wavelength discrimination points) have __ wavelength discrimination
1 wavelength discrimination
38
protanopia and deuteranopia have their best wavelength discrimination at:
about 490 nm
39
what is important about the neutral point for D and P's wavelength and saturation discrimination?
- best wavelength discrimination at NP | - worse saturation discrimination at NP
40
what is the Sloan achromatopsia test used for?
testing for total color blindness (rod monochromats)
41
isomers are:
two lights that look the same and are physically the same
42
metamers are:
two lights that look the same, but are physically different
43
what is the gold standard for testing 'red-green deficiencies'
anomaloscope
44
"illum C" equivalent source must have a color temperature range of:
6000-7000 K (bluish-whiteish)
45
"illum C" equivalent source must have a color rendering index of:
> 90 (out of 100)