Color Vision in Aircrew

Question 1

Define hue, saturation and brightness.

Answer 1

Question 2

List the 3 types of cones and their quantitative relationship.

Answer 2

Red > Green > Blue

Red:Green is 2:1

Red + Green:Blue is 10:1

Question 3

What is color with regards to red, blue and green wavelengths.

Answer 3

Color is what is perceived as the difference between the waves.

Question 4

Define protan dichromat.

Answer 4

Question 5

Define deutan dichromat

Answer 5

Question 6

Define protanomalous anormal color vision.

Answer 6

Question 7

Define deteranomalous abnormal color vision.

Answer 7

Question 8

What is the most common abnormal color vision defect?

Answer 8

Deuternamalous

Question 9

What color cone is lost early in eye disease? What is the pattern between the eyes?

Answer 9

Blue, asymetric

Question 10

List three causes of acquired color deficiency.

Answer 10

1. Macular degeneration
2. DM
3. Glaucoma

Question 11

Describe the cone contrasts test.

Answer 11

Letters only detected by a single cone type. Able to describe severity level. The blue test allows detection of early eye disease.

Question 12

What test is now the USAF gold standard for color vision testing?

Answer 12

CCT

Question 13

Define tritanomalous color deficiency. What is it’s frequency?

Answer 13

Blue deficiency. Very rare hereditary. Commonly seen early in acquired eye disease.