ABO ADVANCED FINAL TEST 2026
QUESTIONS WITH CORRECT
ANSWERS GRADED A+
◍ 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
◍ missing/weak AG resolution step 1.
Answer: incubate front type at RT or lower for at least 15 min
◍ missing/weak AG resolution step 2.
Answer: use anti-A,B
◍ missing/weak AG resolution step 3.
Answer: obtain recent transfusion history and/or bone marrow transplant
history
◍ missing/weak AG resolution step 4.
Answer: specialized tests like adsorption/elution techniques or secretor
studies
◍ The amount of reflection of each surface of CR-39 lenses is approximately:
A. 2%
B. 4%
C. 6%
D. 8%.
Answer: 4%
◍ causes of missing/weak ABs.
Answer: -age (elderly or newborn)-immune def-bone marrow
transplant-chemo or radiation
,◍ 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
◍ missing/weak AB resolution step 1.
Answer: add more serum (4 drops total)
◍ missing/weak AB resolution step 2.
Answer: incubate longer at RT (15-60 min)
◍ 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
◍ missing/weak AB resolution step 3.
Answer: test at colder temps
◍ missing/weak AB resolution step 4.
Answer: start with dry cell button for commercial cells if serum is limited
◍ 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%
◍ 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
◍ 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
◍ causes of extra AGs.
Answer: -acquired B-B subgroup-cold agglutinin
◍ 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
◍ extra AG resolution step 1.
Answer: try another manufacturer's anti-A and anti-B
◍ extra AG resolution step 2.
Answer: warm wash pts cells with warmed saline 3x
◍ 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
◍ resolution to extra AG caused by acquired B.
Answer: use acidified anti-B
◍ extra AB causes.
Answer: -subgrp of grp A-cold alloABs-cold autoAB-rouleaux-transfusion
of ABO varied plasma
◍ extra AB resolution step 1.
Answer: test with anti-A1 lectin and A2 cells
◍ _____ added to any color increases contrast.
A. Gray
B. Brown
C. Violet
D. Yellow.
Answer: Yellow
◍ _____ is better than _____ for improving contrast.
A. Violet/ gray
B. Green/ gray
C. Gray/ green
D. Gray/ violet.
Answer: Green/ Gray
◍ Glare is of more concern to which wearer?
A. Red haired patient
B. Computer user
C. Cataract patient
D. Presbyope.
Answer: Cataract patient
◍ extra AB resolution step 2.
Answer: perform AB screen and ID
QUESTIONS WITH CORRECT
ANSWERS GRADED A+
◍ 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
◍ missing/weak AG resolution step 1.
Answer: incubate front type at RT or lower for at least 15 min
◍ missing/weak AG resolution step 2.
Answer: use anti-A,B
◍ missing/weak AG resolution step 3.
Answer: obtain recent transfusion history and/or bone marrow transplant
history
◍ missing/weak AG resolution step 4.
Answer: specialized tests like adsorption/elution techniques or secretor
studies
◍ The amount of reflection of each surface of CR-39 lenses is approximately:
A. 2%
B. 4%
C. 6%
D. 8%.
Answer: 4%
◍ causes of missing/weak ABs.
Answer: -age (elderly or newborn)-immune def-bone marrow
transplant-chemo or radiation
,◍ 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
◍ missing/weak AB resolution step 1.
Answer: add more serum (4 drops total)
◍ missing/weak AB resolution step 2.
Answer: incubate longer at RT (15-60 min)
◍ 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
◍ missing/weak AB resolution step 3.
Answer: test at colder temps
◍ missing/weak AB resolution step 4.
Answer: start with dry cell button for commercial cells if serum is limited
◍ 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%
◍ 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
◍ 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
◍ causes of extra AGs.
Answer: -acquired B-B subgroup-cold agglutinin
◍ 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
◍ extra AG resolution step 1.
Answer: try another manufacturer's anti-A and anti-B
◍ extra AG resolution step 2.
Answer: warm wash pts cells with warmed saline 3x
◍ 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
◍ resolution to extra AG caused by acquired B.
Answer: use acidified anti-B
◍ extra AB causes.
Answer: -subgrp of grp A-cold alloABs-cold autoAB-rouleaux-transfusion
of ABO varied plasma
◍ extra AB resolution step 1.
Answer: test with anti-A1 lectin and A2 cells
◍ _____ added to any color increases contrast.
A. Gray
B. Brown
C. Violet
D. Yellow.
Answer: Yellow
◍ _____ is better than _____ for improving contrast.
A. Violet/ gray
B. Green/ gray
C. Gray/ green
D. Gray/ violet.
Answer: Green/ Gray
◍ Glare is of more concern to which wearer?
A. Red haired patient
B. Computer user
C. Cataract patient
D. Presbyope.
Answer: Cataract patient
◍ extra AB resolution step 2.
Answer: perform AB screen and ID
