lecture 17 color vision 3 Flashcards
Protanopic is missing function in ____ cones
A) S
B) M
C) L
D) all of the above
C) L
Deuteranopic is missing function in ____ cones
A) S
B) M
C) L
D) all of the above
B) M
Tritanopic is missing function in ____ cones
A) S
B) M
C) L
D) all of the above
A) S
Protanomalous means…
A) L cones are shifted toward M cones
B) M cones are shifted toward L cones
C) M cones are shifted toward S cones
D) S cones are shifted toward M cones
B) M cones are shifted toward L cones
Deuteranomalous means…
A) L cones are shifted toward M cones
B) M cones are shifted toward L cones
C) M cones are shifted toward S cones
D) S cones are shifted toward M cones
B) M cones are shifted toward L cones
What is it called when you have no color vision?
Achromotopsia
What is it called when you only have S cones?
blue cone monochromacy
What are the 2 types of achomatopsia?
rod monochromat and blue cone monochromacy
(T or F) blue cone monochromacy means that you can only see blue
false, this patient would only have functioning S cones, however, with no other cones to compare, this patient would see no color.
Which patient would have better visual acuity between a rod monochromat and a blue cone monochromat
blue cone monochromat since cones provide acuity processing. this patient would probably have 20/20 vision, whereas a rod monochromat would have 20/200 or worse best corrected.
(T or F) most color anomaly disorders are X-linked which means it is more likely for females to be affected.
false, while they are x-linked, these disorders tend to be more frequent in males since women have 2 X’s and would most likely be carriers.
Protoanopic, tritanopic, and deuteranopic are examples of what?
A) monochromacy
B) dichromacy
C) anomalous trichromacy
D achromacy
B) dichromacy
photophobia, nystagmus, poor visual acuity, and achromatopsia is common in which condition?
rod monochromat
A confusion line in a CIE diagram represents:
A) a line in which a dichromat can only see white
B) a line in which a trichromat sees the same hue
C) a line in which a trichromat sees no color
D) a line in which a dichromat sees the same color
D) a line in which a dichromat sees the same color
The first bold plate on the ishihara plates is considered a control plate, however, if your patient cannot distinguish the number on it, what might be the problem?
that person would have no color vision (achromatopsia)
When looking at confusion lines on CIE diagram, you see them crossing the nonspectral purple area, this would be indicitive of which type of dichromat?
deuteranope
When looking at confusion lines on CIE diagram, you see some parallel with the X-axis, this would be indicitive of which type of dichromat?
protanope
When looking at confusion lines on CIE diagram, you see some parallel with the Y-axis, this would be indicitive of which type of dichromat?
tritanope
(T or F) if a confusion line passes thru white, that person will see all hues along that line as white.
True
which anomolous trichromat is the most common?
A) Deuteranomalous
B) Protanomalous
C) tritanomalous
A) Deuteranomalous
(T or F) an anomolous trichromat has 3 functioning cones, however one is shifted
true
(T of F) tritanomalous is so rare that you will probably never see one
true
Which test has a patient place 15 colors in order from blue to red?
Farnsworth D15
A good result of the Farnsworth test as displayed on a CIE diagram is…..
A) a straight line
B) a circular line
C) a zig-zag line
B) a circular line
What device detects color deficiencies by having the patient match colors?
an anomaloscope
