Congenital/Acquired Color Vision Defects

Question 1

What are the differnces between Congenital and acquired defects?

(Progression, OD=OS affected, predictable erros, Visual complaints?)

Answer 1

Congenital: No progression, OD=OS, predictable errors, no visual complaints
Acquired: Progression, OD may not = OS, some object colors incorrectly named, some visual complaints

Question 2

Which is most likely an Acquired defect?

A) Achromat/Monochromat
B) Dichromats
C) Primarily Tritan, Duetan/Protan Defects
D) Trichromat

Answer 2

C) Primarily Tritan, Duetan/Protan Defects

Question 3

What is the inheritance type for a Rod Monochromat/Achromat?

A) Autosomal Dominant, chromosome 7
B) X-linked recessive
C) X-linked recessive, chromosome xp28
D) Autosomal Recessive

Answer 3

D) Autosomal Recessive

Question 4

What is the inheritance type for a Blue Cone monochromacy?

A) Autosomal Dominant, chromosome 7
B) X-linked recessive
C) X-linked recessive, chromosome xp28
D) Autosomal Recessive

Answer 4

B) X-linked recessive

Question 5

What is the inheritance type for a Protanope/Protanomalous Trichromat?

A) Autosomal Dominant, chromosome 7
B) X-linked recessive
C) X-linked recessive, chromosome xp28
D) Autosomal Recessive

Answer 5

C) X-linked recessive, chromosome xp28

Question 6

What is the inheritance type for a Deuteranope/Deuteranomalous Trichromat?

A) Autosomal Dominant, chromosome 7
B) X-linked recessive
C) X-linked recessive, chromosome xp28
D) Autosomal Recessive

Answer 6

C) X-linked recessive, chromosome xp28

Question 7

What is the inheritance type for a Tritanopia/Tritanomalous Trichromat?

A) Autosomal Dominant, chromosome 7
B) X-linked recessive
C) X-linked recessive, chromosome xp28
D) Autosomal Recessive

Answer 7

A) Autosomal Dominant, chromosome 7

Question 8

What are TRUE about Kollner’s Rule?

A) Retinal disease is generally a Red-Green defect
B) Optic neuropathy is generally a Blue-Yellow defect
C) Color deficiencies never change over time
D) Some can have both Red/Green and Blue-Yellow defect

Answer 8

D) Some can have both Red/Green and Blue-Yellow defect

• Retinal disease is generally Blue-Yellow
• Optic neuropathy is generally Red-Green
• Color deficiencies can change over time

Question 9

Why are acquired defects most likely Blue-Yellow?

Answer 9

• there’s fewer Blue-Yellow than Red-Green cones

Question 10

What can cause acquired color defects?

A) Ischemia
B) Mechanical Suppression
C) Nutrition Deficiency
D) Drugs
E) Occupational Exposure
F) All of the Above

Answer 10

F) All of the Above