Free ABOC-AC Practice Questions

Question 1

After changing from standard plastic to polycarbonate lenses, a wearer notices colored fringes along high-contrast edges during side gaze. The effect disappears when the wearer turns the head to view the same edge through the lens center. Prescription, centration, and frame fit have been verified, and the symptom is absent with the previous spectacles. Which change most directly addresses the complaint?

Accepted Answer

Remake the lenses in a material with a higher Abbe value.

Answer

Add an antireflective coating while retaining the same lens material.

Answer

Increase the spectacle back vertex distance.

Answer

Defer the remake until a clinical color-vision assessment is completed.

Question 2

A patient increasingly struggles to distinguish pale steps from the surrounding pavement. Reliable testing under the same illumination and correction shows Snellen acuity of 20/25 at both visits, while the Pelli-Robson log contrast-sensitivity score falls from 1.80 to 1.05. How should these findings be reconciled?

Accepted Answer

Low-contrast visibility has declined despite unchanged high-contrast acuity.

Answer

Contrast sensitivity has improved, despite the reported symptoms.

Answer

Stable high-contrast acuity excludes deterioration in measured visual function.

Answer

Peripheral field loss has developed despite preservation of central acuity.

Question 3

A bifocal order is OD -3.00 -3.00 × 180 and OS -4.00 -1.00 × 090. At the reading point, each line of sight passes 8 mm below its distance optical center; the matching near segments contribute equal prism. Which conventional slab-off correction neutralizes the resulting vertical imbalance at that point?

Accepted Answer

1.60Δ base up in the right lens.

Answer

1.60Δ base down in the right lens.

Answer

0.80Δ base up in the left lens.

Answer

4.80Δ base up in the right lens.

Question 4

"I can read only when I push them up," says a new progressive-lens wearer. The distance prescription and add verify correctly. Restored fitting marks sit 3 mm below the pupils because the frame slides; gently raising it restores comfortable reading. The bridge can be adjusted to hold that position securely. The appropriate first intervention is to:

Accepted Answer

Stabilize the frame at the intended height, then recheck alignment and vision.

Answer

Request a stronger near addition for the reading complaint.

Answer

Remake the lenses with a shorter corridor while retaining the present frame position.

Answer

Suspend dispensing and request another refraction before making a frame adjustment.

Question 5

During an evaluation of anisometropic amblyopia, a seven-year-old views a Worth four-dot target at 40 cm with the red filter over the right eye and the green filter over the left. On repeated presentations, the child reports only three green lights and no doubling. The result demonstrates:

Accepted Answer

Suppression of the right eye under these test conditions.

Answer

Suppression of the left eye under these test conditions.

Answer

Binocular fusion with both eyes contributing to the perceived target.

Answer

Binocular diplopia with simultaneous perception of both eyes' target images.

Question 6

A machinist wears dress frames not rated for occupational protection, fitted with polycarbonate prescription lenses that meet the FDA impact-resistance requirement. The employer's hazard assessment identifies flying metal particles. The patient asks to use these spectacles as the sole eye protection. Which dispensing plan addresses the occupational requirement?

Accepted Answer

Provide hazard-appropriate prescription safety eyewear with side protection.

Answer

Attach side shields to the existing dress spectacles.

Answer

Replace the lenses with thicker polycarbonate while retaining the dress frame.

Answer

Use the dress spectacles beneath a face shield as the primary eye protector.

Question 7

A frame change moves a -9.00 D spherical spectacle lens from a back vertex distance of 12 mm to 18 mm. The new frame cannot be fitted closer, and the prescriber authorizes vertex compensation. To preserve the original corneal-plane effect for distance vision, which replacement back vertex power is required, rounded to the nearest 0.25 D?

Accepted Answer

-9.50 D

Answer

-8.50 D

Answer

-9.00 D

Answer

-10.75 D

Question 8

In a low-vision trial, an older adult with macular disease can resolve bill text when it is enlarged, but faint print remains difficult. Reversing the display to white text on a black background improves sustained reading. Hand tremor prevents stable use of a hand lens, and the patient dislikes a very short working distance. Which aid best matches the demonstrated needs?

Accepted Answer

A desktop video magnifier with adjustable enlargement and contrast polarity.

Answer

An illuminated stand magnifier with fixed optical enlargement.

Answer

A high-plus spectacle microscope used at its prescribed close working distance.

Answer

A higher-powered handheld optical magnifier with an enlarged grip.

Question 9

Two dispensers obtain different sphere readings from the same manual lensmeter. One obtains the correct result with a known verification lens. The other sees the reticle as blurred even with no lens on the instrument and has been turning the power drum to make the view clearer. Which step should precede another measurement?

Accepted Answer

Focus the eyepiece reticle, then check zero without a lens.

Answer

Arrange professional recalibration of the instrument.

Answer

Reset the power-drum scale to offset the difference between the operators.

Answer

Reverse the verification lens to place its front surface against the lens stop.

Question 10

At spectacle pickup, a high myope mentions a sudden shower of floaters and flashes in one eye that began that morning. There is no pain, and central acuity through the previous spectacles remains 20/20. What disposition is warranted?

Accepted Answer

Arrange an immediate dilated retinal examination.

Answer

Schedule a retinal review in one week.

Answer

Refer if a field defect or central blur develops.

Answer

Check the spectacle prescription before deciding on referral.

Free ABOC-AC Practice Questions

Domain 1: Optics 30% of exam

Question 1

Question 2

Question 3

Domain 2: Ocular Anatomy, Physiology, Pathology, and Refraction 33% of exam

Question 4

Question 5

Question 6

Domain 3: Ophthalmic Products 10% of exam

Question 7

Domain 4: Instrumentation 9% of exam

Question 8

Domain 5: Dispensary Protocols and Procedures 10% of exam

Question 9

Domain 6: Laws, Regulations, and Standards 8% of exam

Question 10

That's 10 of 1,030