Color Vision Testing - Arrangement Tests

Question 1

Describe Farnsworth Dichotomous Test (D-15)

(When is it used? Is it an effective screening tool? Does it identify mild color discrimination loss, What does a pass indicate? What is the condition for failure? What do non-crossover errors indicate?)

Answer 1

• Used after patient fails PIC
• Not an effective screening tool
• Identifies moderate/severe color discrimination loss (R-G, B-Y)
• Pass indicates either Color Normal or Mild anomalous color defect
• Condition for failure is 2 crossover
• Non-crossover errors indicate Mild anomlous trichomatic defect or normal

Question 2

What is TRUE about the D-15?

A) Pass may indicate Anomolous Trichromat or color normal
B) Pass may or may not have color naming difficulty
C) Fail can indicate Strong Protanope or Strong Deutanomoly
D) Fail will likely have color naming difficulty
E) All the above are true

Answer 2

E) All the above are true

Question 3

What test can be administered to identify those with a mild color defect?

A) Farnsworth Lantern (FALANT)
B) Lanthony Desaturated D-15
C) Farnsworth 100 Hue test
D) Anomaloscope

Answer 3

B) Lanthony Desaturated D-15

uses pastel colors

Question 4

What test can be administered to identify those with excellent color discrimination?

A) Farnsworth Lantern (FALANT)
B) Lanthony Desaturated D-15
C) Farnsworth 100 Hue test
D) Anomaloscope

Answer 4

C) Farnsworth 100 Hue test

Question 5

If your result on a Farnsworth 100 Hue test is 1,2,5,3,4,6, what is your error score for 5?

Answer 5

Error score is 3 + 2 = 5

Question 6

How would the results of an average discrimination, poor discrimination and color defect compare for Farnsworth 100 Hue Test?

Answer 6

• Average discrimination is a small circle
• Poor color discrimination is jagged small circle
• Color defect is signficantly stretched out

Question 7

What test can be administered to for occupational related work but not clinical?

A) Farnsworth Lantern (FALANT)
B) Lanthony Desaturated D-15
C) Farnsworth 100 Hue test
D) Anomaloscope

Answer 7

A) Farnsworth Lantern (FALANT)

Question 8

Describe Farnsworth Lantern (FALANT) test

Near/Distance test?, Monocular/Binocular, R-G/B-Y defect?, What type of grading? Can it diagnose severity?

Answer 8

• Distance test
• Binocular
• Detects R-G defect only
• Pass/Fail grading
• Does not diagnose protan/deutan severity

Question 9

What two color properties does FALANT utilize?

Color Confusion? Saturation? Does it stimulate in less than ideal viewing conditions?

Answer 9

• Incorporates color confusion and saturation

- Does not stimulate in less than ideal viewing conditions

Question 10

What test is the gold standard for Red-Green color vision testing?

A) Farnsworth Lantern (FALANT)
B) Lanthony Desaturated D-15
C) Farnsworth 100 Hue test
D) Anomaloscope

Answer 10

D) Anomaloscope

Question 11

Describe the Anomaloscope

(Clinical/Research Use?, What does the top half adjust? (From what range) What does the bottom half adjust, How does it match spectral yellow? What is a Color Normal Trichromat treated as for this test?)

Answer 11

• Mainly reserach use
• Top half adjusts color 546-670 nm
• Bottom half adjiust luminance
• Proportional amount of spectral red and green required to match yellow (Raleigh match)
• Color Normal Trichromat treated as Dichromat since S cones not absorbed

Question 12

What is the expected result of a Color Normal Trichromat?

A) One match at equal ratio of 535/670 nm
B) Complete single horizontal line due to red/green confusion but similar to normal luminance function
C) Complete slanted line due to red/green confusion and different luminance function
D) Partially extended horizontal line due to adding extra 546 nm
E) Partially extended slanted line due to adding extra 670 nm

Answer 12

A) One match at equal ratio of 535/670 nm

Question 13

What is the expected result of a Protan?

A) One match at equal ratio of 535/670 nm
B) Complete single horizontal line due to red/green confusion but similar to normal luminance function
C) Complete slanted line due to red/green confusion and different luminance function
D) Partially extended horizontal line due to adding extra 546 nm
E) Partially extended slanted line due to adding extra 670 nm

Answer 13

C) Complete slanted line due to red/green confusion and different luminance function

Question 14

What is the expected result of a Deutan?

A) One match at equal ratio of 535/670 nm
B) Complete single horizontal line due to red/green confusion but similar to normal luminance function
C) Complete slanted line due to red/green confusion and different luminance function
D) Partially extended horizontal line due to adding extra 546 nm
E) Partially extended slanted line due to adding extra 670 nm

Answer 14

B) Complete single horizontal line due to red/green confusion but similar to normal luminance function

Question 15

What is the expected result of a Protanomlous defect?

A) One match at equal ratio of 535/670 nm
B) Complete single horizontal line due to red/green confusion but similar to normal luminance function
C) Complete slanted line due to red/green confusion and different luminance function
D) Partially extended horizontal line due to adding extra 546 nm
E) Partially extended slanted line due to adding extra 670 nm

Answer 15

E) Partially extended slanted line due to adding extra 670 nm

Question 16

What is the expected result of a Deuteranomlous defect?

A) One match at equal ratio of 535/670 nm
B) Complete single horizontal line due to red/green confusion but similar to normal luminance function
C) Complete slanted line due to red/green confusion and different luminance function
D) Partially extended horizontal line due to adding extra 546 nm
E) Partially extended slanted line due to adding extra 670 nm

Answer 16

D) Partially extended horizontal line due to adding extra 546 nm