COA Visual Assessment and Testing 2

Question 1

When testing visual acuity in a child using the Tumbling E chart, what does the child need to indicate?

Accepted Answer

The direction the 'legs' of the letter E are pointing

Answer

The Tumbling E chart is used for patients who cannot name letters. The child indicates — by pointing fingers or using a hand-held card — the direction the 'legs' of the letter E point (up, down, left, or right).

Question 2

What is the purpose of a pinhole occluder during visual acuity testing?

Accepted Answer

To determine whether reduced acuity is due to refractive error

Answer

A pinhole occluder limits incoming light to the central paraxial rays, bypassing refractive error. If vision improves with pinhole, the reduction is likely refractive; if it does not improve, pathology (media opacity, retinal or optic nerve disease) should be suspected.

Question 3

The Ishihara color vision test primarily screens for deficiencies in which color axis?

Accepted Answer

Red-green defects (protan and deutan)

Answer

The Ishihara pseudoisochromatic plates are specifically designed to detect red-green color deficiencies (protanopia, protanomaly, deuteranopia, deuteranomaly), which are the most common inherited color vision defects.

Question 4

A patient's near vision is tested with a near card and documented as J3 at 40 cm. What does this indicate?

Accepted Answer

The patient can read Jaeger size 3 text at 40 cm without correction

Answer

The Jaeger (J) notation is a near vision scale using a series of text paragraphs of increasing size. J3 indicates the patient can read Jaeger size 3 text, a moderately small print size, at the specified test distance of 40 cm.

Question 5

During confrontation visual field testing, the COA is seated opposite the patient at arm's length. Which technique is being used when the examiner wiggles a finger in each quadrant while the patient fixates on the examiner's nose?

Accepted Answer

Finger motion confrontation

Answer

When the examiner wiggles a finger in the peripheral field while the patient fixates on the examiner's face, this is the finger motion (or finger wiggle) confrontation technique — a quick gross screening of the visual field.

COA - Certified Ophthalmic Assistant Practice Test

COA - Certified Ophthalmic Assistant Practice Test

COA Visual Assessment and Testing 2