VSP FINAL EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
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VSP
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VSP
Psychophysical - ACCURATE ANSWERS recall that color vision a type of ______ measure of vision, meaning we are relying on the patient responses to the way they perceive physical stimuli. Color vision is also measuring cone mediated vision at the level of the retina, which is then processed as it is ...
VSP FINAL EXAM 2024\2025
VSP FINAL EXAM 2024\2025 WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
Psychophysical - ACCURATE ANSWERS✔✔ recall that color vision a
type of ______ measure of vision, meaning we are relying on the patient
responses to the way they perceive physical stimuli. Color vision is also
measuring cone mediated vision at the level of the retina, which is then
processed as it is sent to the LGN and visual cortex
Holmgren test for color blindness - ACCURATE ANSWERS✔✔ in
1876 in Sweden there was a train crash, were Holmgren suspected the
crash may be due a color vision abnormality and not interpreting the red
and green properly. to determine this, he tested people on the train with
what is known as the ____ ____ for ____ ____ that uses Berlin Worsted
yarn. Holmgren also published a guide that was used for the first color
vision tests in the navy and army for WWI. due to this, the air force
required full color vision for signaling with ground crew, recognizing
other aircrafts while flying, and judging terrain for emergency landing
,visual approach slope indicator (VASI) - ACCURATE ANSWERS✔✔
color vision is so important in aviation due to the ____ ___ ____ ___,
which is a system of lights on the side of an airport runway threshold
that provides visual descent guidance info during approach to the
runway. these lights either appear white or red depending on what angle
they are viewed from. if the top light is white, the aircraft is flying too
high, if it is red over red, the aircraft is flying too low
quality
financial
metamers - ACCURATE ANSWERS✔✔ so in addition to safety, color
vision was also developed for ____ control and ____. Joseph Williams
Lovibond wanted a way to control the quality of beer, which found that
he could do through color (Levibond tentometer). Lovibond is still a
company today and has many products such as the color matching
cabinet that allows detection of _____ (meaning samples appear to
match under one light source by are different under another). another
example is the color of meat and shelf life
brightness - ACCURATE ANSWERS✔✔ there are additional
inconveniences to not being able to see color well. for example mis-
matching colors when dressing or recall the jets and bills game.
however, some people who are protanopes (meaning they have a red-
green color deficiency), were still able to watch the game with the red
and green jerseys possibly based on the _____
standard illuminant C - ACCURATE ANSWERS✔✔ in a clinical
setting, we ideally want to do the test in a way that we minimize
,variability and bias so we can obtain a true measure of visual function.
therefore, testing conditions, such as lighting, is very important. there
are many different types of bulbs and many color temperatures. a lower
color temp will give off a red hue while a higher color temp will give off
a blue hue. when we are testing color vision, we want to do so under
____ ____ ____ lighting, which has a color temp of 6774 K and plots
near the center of the CEI diagram. this represents indirect day light and
gives an even luminance efficiency across the visual spectrum
standard illuminant A - ACCURATE ANSWERS✔✔ so as we said
standard illuminance C light is very similar to indirect day light. when
we compare to fluorescent bulbs or compact fluorescent bulbs, both of
these have much different illuminance functions in which certain
wavelengths are blocked and are not transmitted. a tungsten
incandescent bulb is an example of ____ ____ ____ lighting and is what
is used in many exam rooms, however, this also provides a different
luminance efficiency curve
things that are not acceptable are a standard desk lamp, tungsten bulbs,
fluorescent bulbs, or LED lights - ACCURATE ANSWERS✔✔
therefore, for repeatable color vision results, anything that mimics
standard illuminance C (or itself) will work. these include these 4
, white photographic
latex free - ACCURATE ANSWERS✔✔ when we purchase a color
vision test, it often comes with ____ ____ gloves or gloves that are ____
____. this will help protect the Munsel paper in the color vision test
from skin oils to ensure we are getting accurate results
pseudoisochromatic plate test
confusion line - ACCURATE ANSWERS✔✔ typically we use ____ ___
tests in which there are numbers or shapes in a book made up of
different colors. these are considered to be "vanishing plates" in which
we are asking the patient to pick out the figure from the background.
normal trichromats should be able to see the number based on the
chromatic differences. however, anomalous trichromats or dichromats
may not see the numbers if they fall on a _____ ____
protans and deutans - ACCURATE ANSWERS✔✔ recall that on the
CIE diagram, _____ and ____ share a confusion line that is the right
sided boarder of the diagram. therefore, anything that falls on this line
(green, yellow, orange, red) are confused, and is what is known as a red-
green color deficiency. but at this point it would remain unclear as to
which the person actually had out of these two
inherited
dichromats
anomalous trichromats - ACCURATE ANSWERS✔✔
pseudoisochromatic plate tests are good at detecting _____ color
anomalies, especially in children. this can also help us to differentiate
between the protan and deutan as they are now falling on different
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