Arrangement Tests

Question 1

What are some advantages of arrangement tests?

Answer 1

Identify all types of defect
Can monitor acquired defects
Can assess severity of defects

Question 2

What are some disadvantages of arrangement tests?

Answer 2

Not a screener
If limited dexterity, px may struggle

Question 3

What distance should you do D15 at?

Answer 3

15cm

Question 4

How many crossings on the D15 is considered a moderate defect?

Answer 4

2

Question 5

How many crossings on the D15 is considered a severe defect?

Answer 5

More than 2

Question 6

What categories are colours separated into in The Munsell System of Specifying Colour?

Answer 6

Wavelength (hue)
Value (brightness)
Chroma (saturation)

Question 7

What Munsell System grades does the D15 use?

Answer 7

Hue: various
Value: 5
Chroma: 4

Question 8

What differences does the desaturated D15 test have? What difference does this make?

Answer 8

Reduced value and chroma
Test is more difficult
Picks up milder defects

Question 9

How is the specificity affected in the desaturated D15?

Answer 9

Reduced - more ‘normals’ can fail it

Question 10

On the Farnsworth-Munsell 100 Hue Test, how much of a misplacement counts as an error?

Answer 10

Difference of 2 between neighbouring caps

Question 11

On the results for a Farnsworth-Munsell test, what does the direction of the spokes indicate?

Answer 11

Type of defect

Question 12

On the results for a Farnsworth-Munsell test, what does the numerical score of the errors indicate?

Answer 12

Larger score = higher severity

Question 13

On the Farnsworth-Munsell, what are the mean positions for a protanope?

Answer 13

17 and 64

Question 14

On the Farnsworth-Munsell, what are the mean positions for a deuteranope?

Answer 14

15 and 58

Question 15

On the Farnsworth-Munsell, what are the mean positions for a tritanope?

Answer 15

5 and 45.5

Question 16

Will the Farnsworth-Munsell pick up mild defects?

Answer 16

Yes

Question 17

When is performance best on the Farnsworth-Munsell?

Answer 17

Late teens

Question 18

What distance should the City Uni test be performed at?

Answer 18

35cm

Question 19

How long should you present each page of the City Uni test for?

Answer 19

3 seconds

Question 20

How does the City Uni test work?

Answer 20

Each colour around the central dot is either: normal, protan, deutan or tritan

Question 21

Which deficiency makes the least mistakes on the City Uni test?

Answer 21

Protans

Question 22

How does the Mollon-Reffin test work?

Answer 22

Works out limits of px’s ability to discriminate between hues using staircase method - starts at most desaturated and moves out on each line
Start with protan, then deutan, then tritan
Put each cap within grey caps and ask px to differentiate - if can, reduce saturation, if can’t increase

Question 23

On the tritan line on Mollon-Reffin, what is an acceptable result for a px with possible lens yellowing?

Answer 23

T2