ABO ADVANCED FINAL TEST Questions with Correct Answers
(Grade A+)
Question 1: causes of missing/weak AG.
Answer: -weak A or B subgroup-loss of transferase (acute leukemia)-massive transfusion of grp O
blood-bone marrow transplant
Question 2: missing/weak AG resolution step 1.
Answer: incubate front type at RT or lower for at least 15 min
Question 3: missing/weak AG resolution step 2.
Answer: use anti-A,B
Question 4: missing/weak AG resolution step 3.
Answer: obtain recent transfusion history and/or bone marrow transplant history
Question 5: missing/weak AG resolution step 4.
Answer: specialized tests like adsorption/elution techniques or secretor studies
Question 6: The amount of reflection of each surface of CR-39 lenses is approximately:
A. 2%
B. 4%
C. 6%
D. 8%.
Answer: 4%
Question 7: causes of missing/weak ABs.
Answer: -age (elderly or newborn)-immune def-bone marrow transplant-chemo or radiation
Question 8: The absorption of light in lenses is classified by two variables. What are they?
A. Base curve and thickness
B. Index of refraction and thickness
C. Thickness and lens transmission
D. Tint and lens transmission.
Answer: Tint and lens transmission
Page 1
,Question 9: missing/weak AB resolution step 1.
Answer: add more serum (4 drops total)
Question 10: missing/weak AB resolution step 2.
Answer: incubate longer at RT (15-60 min)
Question 11: The denser the tint in a lens,
A. The greater transmission of light through the lens
B. The greater internal reflections in the lens
C. The less transmission of light through the lens
D. The fewer internal reflections in the lens.
Answer: The less transmission of light through the lens
Question 12: missing/weak AB resolution step 3.
Answer: test at colder temps
Question 13: missing/weak AB resolution step 4.
Answer: start with dry cell button for commercial cells if serum is limited
Question 14: Standard transmissions in sun lenses should range between:
A. 10% and 30%
B. 15% and 30%
C. 10% and 25%
D. 15% and 25%.
Answer: 15% and 30%
Question 15: If a person has exposure to sunlight at least 2 hours or more during the day:
A. Their tolerance of bright sunlight is increased
B. Their tolerance of bright sunlight is decreased
C. Their ability to adapt too quick lighting changes is increased
D. Their ability to adapt to night visions compromised if they don't protect their eyes from the sun exposure.
Answer: Their ability to adapt to night vision is compromised if they don't protect their eyes from sun
exposure
Page 2
,Question 16: A characteristic of a dark tinted glass lens w/ an Rx of +4.00D sph would be:
A. Uniform density in color
B. Dark on the edge and lighter in the center
C. Dark in the center and lighter on the edge
D. Waves in the tint.
Answer: Dark in the center and lighter on the edge
Question 17: causes of extra AGs.
Answer: -acquired B-B subgroup-cold agglutinin
Question 18: Given a high plus or high minus Rx, which lens material would offer the best choice for
uniform density in a sun lens?
A. Pigmented lens
B. CR-39
C. Trivex
D. Both B&C.
Answer: Both B&C CR-39 and Trivex
Question 19: extra AG resolution step 1.
Answer: try another manufacturer's anti-A and anti-B
Question 20: extra AG resolution step 2.
Answer: warm wash pts cells with warmed saline 3x
Question 21: Although this may be the most popular color for sun lenses, it is not recommended for
patients with emerging cataracts.
A. Green
B. Brown
C. Gray
D. Melanin.
Answer: Gray
Question 22: resolution to extra AG caused by acquired B.
Answer: use acidified anti-B
Question 23: extra AB causes.
Answer: -subgrp of grp A-cold alloABs-cold autoAB-rouleaux-transfusion of ABO varied plasma
Page 3
, Question 24: extra AB resolution step 1.
Answer: test with anti-A1 lectin and A2 cells
Question 25: _____ added to any color increases contrast.
A. Gray
B. Brown
C. Violet
D. Yellow.
Answer: Yellow
Question 26: _____ is better than _____ for improving contrast.
A. Violet/ gray
B. Green/ gray
C. Gray/ green
D. Gray/ violet.
Answer: Green/ Gray
Question 27: Glare is of more concern to which wearer?
A. Red haired patient
B. Computer user
C. Cataract patient
D. Presbyope.
Answer: Cataract patient
Question 28: extra AB resolution step 2.
Answer: perform AB screen and ID
Question 29: extra AB resolution step 3.
Answer: ID AB specificity
Question 30: _____ are generally inorganic materials (metals and minerals) that are vacuum deposited
to add color on glass lenses to give a uniform density color on the lenses.
A. Vacuum color coatings
B. Deposit color coatings
C. Heavy color coatings
D. AR color coatings.
Answer: Vacuum color coatings
Page 4
(Grade A+)
Question 1: causes of missing/weak AG.
Answer: -weak A or B subgroup-loss of transferase (acute leukemia)-massive transfusion of grp O
blood-bone marrow transplant
Question 2: missing/weak AG resolution step 1.
Answer: incubate front type at RT or lower for at least 15 min
Question 3: missing/weak AG resolution step 2.
Answer: use anti-A,B
Question 4: missing/weak AG resolution step 3.
Answer: obtain recent transfusion history and/or bone marrow transplant history
Question 5: missing/weak AG resolution step 4.
Answer: specialized tests like adsorption/elution techniques or secretor studies
Question 6: The amount of reflection of each surface of CR-39 lenses is approximately:
A. 2%
B. 4%
C. 6%
D. 8%.
Answer: 4%
Question 7: causes of missing/weak ABs.
Answer: -age (elderly or newborn)-immune def-bone marrow transplant-chemo or radiation
Question 8: The absorption of light in lenses is classified by two variables. What are they?
A. Base curve and thickness
B. Index of refraction and thickness
C. Thickness and lens transmission
D. Tint and lens transmission.
Answer: Tint and lens transmission
Page 1
,Question 9: missing/weak AB resolution step 1.
Answer: add more serum (4 drops total)
Question 10: missing/weak AB resolution step 2.
Answer: incubate longer at RT (15-60 min)
Question 11: The denser the tint in a lens,
A. The greater transmission of light through the lens
B. The greater internal reflections in the lens
C. The less transmission of light through the lens
D. The fewer internal reflections in the lens.
Answer: The less transmission of light through the lens
Question 12: missing/weak AB resolution step 3.
Answer: test at colder temps
Question 13: missing/weak AB resolution step 4.
Answer: start with dry cell button for commercial cells if serum is limited
Question 14: Standard transmissions in sun lenses should range between:
A. 10% and 30%
B. 15% and 30%
C. 10% and 25%
D. 15% and 25%.
Answer: 15% and 30%
Question 15: If a person has exposure to sunlight at least 2 hours or more during the day:
A. Their tolerance of bright sunlight is increased
B. Their tolerance of bright sunlight is decreased
C. Their ability to adapt too quick lighting changes is increased
D. Their ability to adapt to night visions compromised if they don't protect their eyes from the sun exposure.
Answer: Their ability to adapt to night vision is compromised if they don't protect their eyes from sun
exposure
Page 2
,Question 16: A characteristic of a dark tinted glass lens w/ an Rx of +4.00D sph would be:
A. Uniform density in color
B. Dark on the edge and lighter in the center
C. Dark in the center and lighter on the edge
D. Waves in the tint.
Answer: Dark in the center and lighter on the edge
Question 17: causes of extra AGs.
Answer: -acquired B-B subgroup-cold agglutinin
Question 18: Given a high plus or high minus Rx, which lens material would offer the best choice for
uniform density in a sun lens?
A. Pigmented lens
B. CR-39
C. Trivex
D. Both B&C.
Answer: Both B&C CR-39 and Trivex
Question 19: extra AG resolution step 1.
Answer: try another manufacturer's anti-A and anti-B
Question 20: extra AG resolution step 2.
Answer: warm wash pts cells with warmed saline 3x
Question 21: Although this may be the most popular color for sun lenses, it is not recommended for
patients with emerging cataracts.
A. Green
B. Brown
C. Gray
D. Melanin.
Answer: Gray
Question 22: resolution to extra AG caused by acquired B.
Answer: use acidified anti-B
Question 23: extra AB causes.
Answer: -subgrp of grp A-cold alloABs-cold autoAB-rouleaux-transfusion of ABO varied plasma
Page 3
, Question 24: extra AB resolution step 1.
Answer: test with anti-A1 lectin and A2 cells
Question 25: _____ added to any color increases contrast.
A. Gray
B. Brown
C. Violet
D. Yellow.
Answer: Yellow
Question 26: _____ is better than _____ for improving contrast.
A. Violet/ gray
B. Green/ gray
C. Gray/ green
D. Gray/ violet.
Answer: Green/ Gray
Question 27: Glare is of more concern to which wearer?
A. Red haired patient
B. Computer user
C. Cataract patient
D. Presbyope.
Answer: Cataract patient
Question 28: extra AB resolution step 2.
Answer: perform AB screen and ID
Question 29: extra AB resolution step 3.
Answer: ID AB specificity
Question 30: _____ are generally inorganic materials (metals and minerals) that are vacuum deposited
to add color on glass lenses to give a uniform density color on the lenses.
A. Vacuum color coatings
B. Deposit color coatings
C. Heavy color coatings
D. AR color coatings.
Answer: Vacuum color coatings
Page 4
