ABO PRE-TEST COMPREHENSIVE STUDY GUIDE Questions
with Correct Answers (Grade A+)
Question 1: The specifications for the drop ball test from the American National Standards Institute for
general wear eyewear are:
A. 1 inch steel ball, dropped 50 inches
B. 5/8 inch steel ball, dropped 40 inches
C. 5/8 inch steel ball, dropped 50 inches
D. 1 inch steel ball, dropped 40 inches.
Answer: c. 5/8 inch steel ball, dropped 50 inches
Question 2: The height of the standard Drop Ball test according to FDA regulations is approximately:
A. 50 inches
B. 80 inches
C. 60 inches
D. 70 inches.
Answer: a. 50 inches
Question 3: To perform a Drop Ball Test for dress safety lenses a 5/8 inch steel ball weighing
_____________ is dropped 50 inches onto the surface of the lens.
A. 5/8 ounce
B. 6/10 ounce
C. 1 ounce
D. 5 ounces.
Answer: b. 6/10 ounce
Question 4: In pediatric fitting, correct __________ angle is achieved by matching the nose pad angle to
the angles created by the sides of the nose where each pad rests.
A. frontal
B. vertical
C. crest
D. splay.
Answer: d. splay
Question 5: Over-the-ear hearing aids are most comfortable when _____________ are used.
A. library temples
B. skull temples
C. comfort cable temples
D. convertible temples.
Answer: c. comfort cable temples
Page 1
,Question 6: Bicentric grinding is also known as:
A. slab-off
B. safety bevel
C. prism axis
D. reading level.
Answer: a. slab-off
Question 7: A cross curve is:
A. the only curve on a lens
B. the stronger curve of a toric lens surface
C. another term for base curve
D. a peripheral curv
E.
Answer: b. the stronger curve of a toric lens surface
Question 8: A line drawn parallel to and halfway between horizontal lines tangent to the lowest and
highest edges of the lens is referred to as the:
A. dividing line
B. layout line
C. datum line
D. parallax.
Answer: c. datum line
Question 9: If the PD = 65/62 and the rx = +4.00 OU, add +4.00 OU, the recommended inset would be:
A. 1 mm in OU
B. 1.5 mm in OU
C. 2 mm in OU
D. 3 mm in OU.
Answer: b. 1.5 mm in OU
Question 10: Which of the following bifocal styles would result in the least total prismatic effect in the
reading area for the rx -9.50 OS add +2.50?
A. executive
B. ST40
C. round 22
D. ultex A.
Answer: a. executive
Page 2
,Question 11: The intermediate portion of a trifocal is designed to produce clear images about
_________ inches away.
A. 20 inches
B. 30 inches
C. 16 inches
D. 50 inches.
Answer: b. 30 inches
Question 12: On a PAL the prismatic effect is verified at the:
A. fitting cross
B. lower circle where the near power is verified
C. dot directly below the fitting cross
D. upper semicircl
E.
Answer: c. dot directly below the fitting cross
Question 13: When neutralizing a progressive addition lens it is the _____________ who determines
where the distance power should be verified.
A. doctor
B. manufacturer
C. dispenser
D. none of the abov
E.
Answer: b. manufacturer
Question 14: The instrument used to measure vertex distance is called:
A. vertometer
B. exophthalmometer
C. calipers
D. distometer.
Answer: d. distometer
Question 15: Of the following, which would you most likely use for a child?
A. straight-top 35
B. round 22
C. round seg
D. straight-top 28.
Answer: a. straight-top 35
Page 3
, Question 16: Which segment style would you choose for a plumber who requires above eye-level close
vision?
A. ribbon
B. round 22
C. franklin style
D. double d.
Answer: d. double d
Question 17: DBL refers to:
A. distance below line
B. decentration between lenses
C. closest distance between lenses
D. double d.
Answer: c. closest distance between lenses
Question 18: If B = 44 what is the bifocal height if the segment is to be set 3 below?
A. 22
B. 20
C. 19
D. 18.
Answer: c. 19
Question 19: A person with erect posture, head held back, would need his segs set ____________ when
measuring for a multifocal lens.
A. higher than normal
B. without compensation
C. lower than normal
D. with a greater inset.
Answer: c. lower than normal
Question 20: On which of the following lenses would you perform a bicentric grind on a plastic lens to
correct for vertical imbalance at the reading level?OD: -1.00 -1.00 x 045OS: -4.00 -1.00 x 060a. ODb.
OSc. split the correction between both eyesd. a bicentric grind is unnecessary with this prescription.
Answer: b. OS
Page 4
with Correct Answers (Grade A+)
Question 1: The specifications for the drop ball test from the American National Standards Institute for
general wear eyewear are:
A. 1 inch steel ball, dropped 50 inches
B. 5/8 inch steel ball, dropped 40 inches
C. 5/8 inch steel ball, dropped 50 inches
D. 1 inch steel ball, dropped 40 inches.
Answer: c. 5/8 inch steel ball, dropped 50 inches
Question 2: The height of the standard Drop Ball test according to FDA regulations is approximately:
A. 50 inches
B. 80 inches
C. 60 inches
D. 70 inches.
Answer: a. 50 inches
Question 3: To perform a Drop Ball Test for dress safety lenses a 5/8 inch steel ball weighing
_____________ is dropped 50 inches onto the surface of the lens.
A. 5/8 ounce
B. 6/10 ounce
C. 1 ounce
D. 5 ounces.
Answer: b. 6/10 ounce
Question 4: In pediatric fitting, correct __________ angle is achieved by matching the nose pad angle to
the angles created by the sides of the nose where each pad rests.
A. frontal
B. vertical
C. crest
D. splay.
Answer: d. splay
Question 5: Over-the-ear hearing aids are most comfortable when _____________ are used.
A. library temples
B. skull temples
C. comfort cable temples
D. convertible temples.
Answer: c. comfort cable temples
Page 1
,Question 6: Bicentric grinding is also known as:
A. slab-off
B. safety bevel
C. prism axis
D. reading level.
Answer: a. slab-off
Question 7: A cross curve is:
A. the only curve on a lens
B. the stronger curve of a toric lens surface
C. another term for base curve
D. a peripheral curv
E.
Answer: b. the stronger curve of a toric lens surface
Question 8: A line drawn parallel to and halfway between horizontal lines tangent to the lowest and
highest edges of the lens is referred to as the:
A. dividing line
B. layout line
C. datum line
D. parallax.
Answer: c. datum line
Question 9: If the PD = 65/62 and the rx = +4.00 OU, add +4.00 OU, the recommended inset would be:
A. 1 mm in OU
B. 1.5 mm in OU
C. 2 mm in OU
D. 3 mm in OU.
Answer: b. 1.5 mm in OU
Question 10: Which of the following bifocal styles would result in the least total prismatic effect in the
reading area for the rx -9.50 OS add +2.50?
A. executive
B. ST40
C. round 22
D. ultex A.
Answer: a. executive
Page 2
,Question 11: The intermediate portion of a trifocal is designed to produce clear images about
_________ inches away.
A. 20 inches
B. 30 inches
C. 16 inches
D. 50 inches.
Answer: b. 30 inches
Question 12: On a PAL the prismatic effect is verified at the:
A. fitting cross
B. lower circle where the near power is verified
C. dot directly below the fitting cross
D. upper semicircl
E.
Answer: c. dot directly below the fitting cross
Question 13: When neutralizing a progressive addition lens it is the _____________ who determines
where the distance power should be verified.
A. doctor
B. manufacturer
C. dispenser
D. none of the abov
E.
Answer: b. manufacturer
Question 14: The instrument used to measure vertex distance is called:
A. vertometer
B. exophthalmometer
C. calipers
D. distometer.
Answer: d. distometer
Question 15: Of the following, which would you most likely use for a child?
A. straight-top 35
B. round 22
C. round seg
D. straight-top 28.
Answer: a. straight-top 35
Page 3
, Question 16: Which segment style would you choose for a plumber who requires above eye-level close
vision?
A. ribbon
B. round 22
C. franklin style
D. double d.
Answer: d. double d
Question 17: DBL refers to:
A. distance below line
B. decentration between lenses
C. closest distance between lenses
D. double d.
Answer: c. closest distance between lenses
Question 18: If B = 44 what is the bifocal height if the segment is to be set 3 below?
A. 22
B. 20
C. 19
D. 18.
Answer: c. 19
Question 19: A person with erect posture, head held back, would need his segs set ____________ when
measuring for a multifocal lens.
A. higher than normal
B. without compensation
C. lower than normal
D. with a greater inset.
Answer: c. lower than normal
Question 20: On which of the following lenses would you perform a bicentric grind on a plastic lens to
correct for vertical imbalance at the reading level?OD: -1.00 -1.00 x 045OS: -4.00 -1.00 x 060a. ODb.
OSc. split the correction between both eyesd. a bicentric grind is unnecessary with this prescription.
Answer: b. OS
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