Color Vision Deficiencies - Deuteranopia & Trichromats Flashcards
Describe Deuteranopia
(What cone is missing, what region (color and wavelength) will not be seen/monochromatic, shortest visual spectrum?, what colors are confused, Inheritance and prevalence)
- chlorolabe, medium wavelength cone missing
- green is not seen, monochromatic above 545 nm
- Confuse red, yellow, green, blue and purple
- X-linked recessive, 1% males
Deuternopes are essentially monochromatic beginning at what wavelength?
A. 492 nm B. 498 nm B. 502 nm C. 545 nm D. 560 nm
C. 545 nm
Deuternopes have best wavelength discrimination at what wavelength?
A. 492 nm B. 498 nm B. 502 nm C. 545 nm D. 560 nm
B. 502 nm
Color normal is at 490 and 580 nm
Deuternopes have peak photopic luminance at what wavelength?
A. 492 nm B. 498 nm B. 502 nm C. 545 nm D. 560 nm
D. 560 nm
Deuternopes have peak saturation at what wavelength?
A. 492 nm B. 498 nm B. 502 nm C. 545 nm D. 560 nm
B. 498 nm
Describe Tritanopia
(What cone is missing, what color will not be seen, what colors are confused, What is the peak luminosity and saturation wavelength (Same as color normal), Inheritance)
- cyanolabe, short wavelength cone missing
- blue is not seen
- Confuse blue with blue-green green, white with yellow
- Peak luminosity is 555 nm
- Saturation is at 570 nm
- AD
What is FALSE about Anomolous Trichromats?
A. Person has all three cones, but one can be anomolous leading to color deficiency
B. Protanomalous Trichromats have long wavelength cones that shift to the left
C. Deuteranomalous Trichromats have medium wavelength cones that shift to the right
D. Anomolous Trichromats wavelength descrimination is always consistent with a normal trichromat.
D. Anomolous Trichromats wavelength descrimination is always consistent with a normal trichromat.
Wavelength descrimination can vary.
What is TRUE about Anomolous Trichromat photopic luminance function?
A. Dueteranomolous is not significant different from color normal
B. Protanomolous may be closer to 555 or 540 nm
C. Both are TRUE
C. Both are TRUE
What is FALSE about Anomolous Trichromat saturation, prevalence and Inheritance?
A. Dueteranomolous saturation function not is the same as a non-color deficient individual
B. 492 nm and 498 nm were least saturated
C. Saturation will appear white
D. Deuteranomoly is the most prevalent form
E. Protanomoly and deuteranomoly are X-linked
C. Saturation will appear white
Saturation will NOT appear white
Describe Color Confusion of an Anomolous Trichromat
(Difficulty in unsaturated colors, greater metameric matches, What colors do Protanomoly and Deuteranomoly add in excess to created abnormal color match?)
- Diffuculty in unsaturated colors
- Greater metameric matches
- Protanomaly - adds excess red
- Deuteranomaly - add excess green
Does HRR test specifically for dichromat or anomalous trichromat? YES/NO
NO
