ABO-NCLE PRACTICAL TEST EXAM 2025 ACTUAL EXAM COMPLETE
100+ QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) ALREADY GRADED A+
Question 1
The refractive astigmatism indicated by the RX +1.50 -1.75 x 35 is:
A) Compound myopic
B) Simple myopic
C) Simple hyperopic
D) Compound hyperopic
E) Mixed
Correct Answer: E) Mixed
Rationale: In a mixed astigmatism, one principal meridian is myopic (minus power) and the
other is hyperopic (plus power). In the given RX (+1.50 -1.75 x 35), converting to plus
cylinder form would reveal both plus and minus principal meridians.
Question 2
A patient's RX is -1.75 -.50 x 120 with a +2.00 ADD standard trifocal. What is the power through
the intermediate?
A) -1.75 -.50 x 120
B) +.25 -.50 x 120
C) -1.25 -.50 x 120
D) -.75 -.50 x 120
E) +1.00 -.50 x 120
Correct Answer: D) -.75 -.50 x 120
Rationale: A standard trifocal's intermediate power is typically 50% of the add power. So,
50% of +2.00 is +1.00. Adding +1.00 to the distance sphere (-1.75) gives -0.75. The cylinder
remains the same.
Question 3
The Geneva lens measure is designed to measure:
A) Lens thickness.
B) Lens diameter.
C) Lens weight.
D) Lens curvature.
E) Lens power.
Correct Answer: D) Lens curvature.
Rationale: The Geneva lens measure (or lens clock) measures the curvature of a lens surface
in diopters.
Question 4
The focal length of a +5.00 diopter lens is:
A) 5 cm
B) 10 cm
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C) 50 cm
D) 20 cm
E) 100 cm
Correct Answer: D) 20 cm
Rationale: Focal length (in meters) = 1 / Dioptric Power. So, 1 / +5.00 = 0.20 meters, which is
20 cm.
Question 5
The problem of prismatic imbalance at the reading level is called:
A) Aniseikonia
B) Diplopia
C) Strabismus
D) Presbyopia
E) Anisometropia
Correct Answer: E) Anisometropia
Rationale: While anisometropia (unequal refractive error between eyes) is the underlying
cause, the problem of prismatic imbalance at reading level, often due to anisometropia, is a
significant visual symptom.
Question 6
Which of the following indicated the most acute distance vision?
A) 20/20
B) 20/25
C) 20/30
D) 20/40
E) 20/15
Correct Answer: E) 20/15
Rationale: In Snellen notation, the smaller the second number, the more acute the vision.
20/15 means the patient can see at 20 feet what a person with "normal" vision (20/20) can
see at 15 feet.
Question 7
Which of the following is not a potential correction for vertical imbalance?
A) Slab off
B) Reverse slab off
C) Fresnal prism
D) Ground in prism
E) Vertex Compensation
Correct Answer: E) Vertex Compensation
Rationale: Vertex compensation adjusts lens power for changes in vertex distance but does
not directly correct vertical prismatic imbalance.
, [Type here]
Question 8
The ability of the eye to focus on objects at varying distances is known as:
A) Convergence
B) Divergence
C) Refraction
D) Version
E) Accommodation
Correct Answer: E) Accommodation
Rationale: Accommodation is defined as "The ability of the eye to focus on objects at
varying distances."
Question 9
Aniseikonia is due to:
A) Unequal refractive error.
B) Unequal visual acuity.
C) Unequal size retinal images.
D) Unequal pupillary size.
E) Unequal accommodative effort.
Correct Answer: C) Unequal size retinal images.
Rationale: Aniseikonia is defined as "Unequal size retinal images."
Question 10
The corner of the eye where the upper and lower lids meet is the:
A) Cilia
B) Tarsal plate
C) Palpebral fissure
D) Lacrimal puncta
E) Canthus
Correct Answer: E) Canthus
Rationale: Canthus is defined as "The corner of the eye where the upper and lower lids
meet."
Question 11
A ptosis crutch is used to:
A) Support the lower lid.
B) Hold an artificial eye.
C) Support a drooping eyelid.
D) Correct strabismus.
E) Prevent eye closure.
Correct Answer: C) Support a drooping eyelid.
Rationale: A ptosis crutch is used for "Drooping lid."
100+ QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) ALREADY GRADED A+
Question 1
The refractive astigmatism indicated by the RX +1.50 -1.75 x 35 is:
A) Compound myopic
B) Simple myopic
C) Simple hyperopic
D) Compound hyperopic
E) Mixed
Correct Answer: E) Mixed
Rationale: In a mixed astigmatism, one principal meridian is myopic (minus power) and the
other is hyperopic (plus power). In the given RX (+1.50 -1.75 x 35), converting to plus
cylinder form would reveal both plus and minus principal meridians.
Question 2
A patient's RX is -1.75 -.50 x 120 with a +2.00 ADD standard trifocal. What is the power through
the intermediate?
A) -1.75 -.50 x 120
B) +.25 -.50 x 120
C) -1.25 -.50 x 120
D) -.75 -.50 x 120
E) +1.00 -.50 x 120
Correct Answer: D) -.75 -.50 x 120
Rationale: A standard trifocal's intermediate power is typically 50% of the add power. So,
50% of +2.00 is +1.00. Adding +1.00 to the distance sphere (-1.75) gives -0.75. The cylinder
remains the same.
Question 3
The Geneva lens measure is designed to measure:
A) Lens thickness.
B) Lens diameter.
C) Lens weight.
D) Lens curvature.
E) Lens power.
Correct Answer: D) Lens curvature.
Rationale: The Geneva lens measure (or lens clock) measures the curvature of a lens surface
in diopters.
Question 4
The focal length of a +5.00 diopter lens is:
A) 5 cm
B) 10 cm
,[Type here]
C) 50 cm
D) 20 cm
E) 100 cm
Correct Answer: D) 20 cm
Rationale: Focal length (in meters) = 1 / Dioptric Power. So, 1 / +5.00 = 0.20 meters, which is
20 cm.
Question 5
The problem of prismatic imbalance at the reading level is called:
A) Aniseikonia
B) Diplopia
C) Strabismus
D) Presbyopia
E) Anisometropia
Correct Answer: E) Anisometropia
Rationale: While anisometropia (unequal refractive error between eyes) is the underlying
cause, the problem of prismatic imbalance at reading level, often due to anisometropia, is a
significant visual symptom.
Question 6
Which of the following indicated the most acute distance vision?
A) 20/20
B) 20/25
C) 20/30
D) 20/40
E) 20/15
Correct Answer: E) 20/15
Rationale: In Snellen notation, the smaller the second number, the more acute the vision.
20/15 means the patient can see at 20 feet what a person with "normal" vision (20/20) can
see at 15 feet.
Question 7
Which of the following is not a potential correction for vertical imbalance?
A) Slab off
B) Reverse slab off
C) Fresnal prism
D) Ground in prism
E) Vertex Compensation
Correct Answer: E) Vertex Compensation
Rationale: Vertex compensation adjusts lens power for changes in vertex distance but does
not directly correct vertical prismatic imbalance.
, [Type here]
Question 8
The ability of the eye to focus on objects at varying distances is known as:
A) Convergence
B) Divergence
C) Refraction
D) Version
E) Accommodation
Correct Answer: E) Accommodation
Rationale: Accommodation is defined as "The ability of the eye to focus on objects at
varying distances."
Question 9
Aniseikonia is due to:
A) Unequal refractive error.
B) Unequal visual acuity.
C) Unequal size retinal images.
D) Unequal pupillary size.
E) Unequal accommodative effort.
Correct Answer: C) Unequal size retinal images.
Rationale: Aniseikonia is defined as "Unequal size retinal images."
Question 10
The corner of the eye where the upper and lower lids meet is the:
A) Cilia
B) Tarsal plate
C) Palpebral fissure
D) Lacrimal puncta
E) Canthus
Correct Answer: E) Canthus
Rationale: Canthus is defined as "The corner of the eye where the upper and lower lids
meet."
Question 11
A ptosis crutch is used to:
A) Support the lower lid.
B) Hold an artificial eye.
C) Support a drooping eyelid.
D) Correct strabismus.
E) Prevent eye closure.
Correct Answer: C) Support a drooping eyelid.
Rationale: A ptosis crutch is used for "Drooping lid."
