Color Vision 1 Exam with Complete Solutions
You should remember the electromagnetic spectrum.
The visible spectrum is between 400-700 nm
You should know the circuitry of the primate retina.
Inner——-
Ganglion Cell Layer
Inner Plexiform Layer
Inner Nuclear Layer
Outer Plexiform Layer
Receptor Terminals
Outer——-
You should know the layers of the retina.
Inner——
1. Internal limiting membrane
2. Nerve fiber layer
3. Ganglion cell layer
4. Inner plexiform layer
5. Inner nuclear layer
6. Outer plexiform layer
7. Outer nuclear layer
8. External limiting membrane
9. Photoreceptor layer
10. RPE
Outer——-
Know the peak under Photopic and Scotopic conditions. Photopic conditions peak is
1._______ nm (yellow-green). Scotopic conditions peak is 2._______ nm.
1. 555
2. 507
, Know this. ____ _____ is the change in peak sensitive observed when shifting shifting
from scotopic to Photopic vision.
Purkinje Shift
What is the photochromatic interval?
Difference in sensitivity between scotopic and photopic systems for a given wavelength
Overall Spectral Sensitivity and luminance sensitivity
• Important point:
◦ this shows the a-chromatic (without color) luminance system; this is just brightness it
doesn't matter what the wavelength is because we are only seeing it in black and white,
its the luminance system.
◦ The three peaks are from the 3 cones, S, L, M- The chromatic sensitivity
Remember this. What is the principle of Univariance?
When a photoreceptor absorbs a wavelength we dont know what the wavelength was;
when it absorbs a photon or quantum of light we dont care if it has a short or long
wavelength, it just causes it to fire. What makes a difference is the probability of
absorption; so an M cone is more likely to absorb a photon that is 533 nm than one that
is 610 nm, but once it absorbs it, it can't tell the difference between a 533 nm or 610 nm;
b/c once it is absorbed all information regarding wavelength is lost.
Pigments, such as paints obey 1. ______ color mixture rules whereas lights obey
2._____ color mixture rules. Consequently yellow paint mixed with blue paint yields
green paint. Yellow light mixed with blue light yields white light.
1. Subtractive
2. Additive
- Object light seems brighter b/c its additive the intensity of the light adds up
You should remember the electromagnetic spectrum.
The visible spectrum is between 400-700 nm
You should know the circuitry of the primate retina.
Inner——-
Ganglion Cell Layer
Inner Plexiform Layer
Inner Nuclear Layer
Outer Plexiform Layer
Receptor Terminals
Outer——-
You should know the layers of the retina.
Inner——
1. Internal limiting membrane
2. Nerve fiber layer
3. Ganglion cell layer
4. Inner plexiform layer
5. Inner nuclear layer
6. Outer plexiform layer
7. Outer nuclear layer
8. External limiting membrane
9. Photoreceptor layer
10. RPE
Outer——-
Know the peak under Photopic and Scotopic conditions. Photopic conditions peak is
1._______ nm (yellow-green). Scotopic conditions peak is 2._______ nm.
1. 555
2. 507
, Know this. ____ _____ is the change in peak sensitive observed when shifting shifting
from scotopic to Photopic vision.
Purkinje Shift
What is the photochromatic interval?
Difference in sensitivity between scotopic and photopic systems for a given wavelength
Overall Spectral Sensitivity and luminance sensitivity
• Important point:
◦ this shows the a-chromatic (without color) luminance system; this is just brightness it
doesn't matter what the wavelength is because we are only seeing it in black and white,
its the luminance system.
◦ The three peaks are from the 3 cones, S, L, M- The chromatic sensitivity
Remember this. What is the principle of Univariance?
When a photoreceptor absorbs a wavelength we dont know what the wavelength was;
when it absorbs a photon or quantum of light we dont care if it has a short or long
wavelength, it just causes it to fire. What makes a difference is the probability of
absorption; so an M cone is more likely to absorb a photon that is 533 nm than one that
is 610 nm, but once it absorbs it, it can't tell the difference between a 533 nm or 610 nm;
b/c once it is absorbed all information regarding wavelength is lost.
Pigments, such as paints obey 1. ______ color mixture rules whereas lights obey
2._____ color mixture rules. Consequently yellow paint mixed with blue paint yields
green paint. Yellow light mixed with blue light yields white light.
1. Subtractive
2. Additive
- Object light seems brighter b/c its additive the intensity of the light adds up
