CPOA Visual Acuity Testing 3

Question 1

When testing visual acuity monocularly, which eye is typically tested first?

Accepted Answer

Right eye always

Answer

By convention, the right eye (OD) is tested first, followed by the left eye (OS), and then both eyes together (OU).

Question 2

What does it mean if a patient's best-corrected visual acuity (BCVA) is 20/20?

Accepted Answer

With the best possible correction, the patient sees normally

Answer

BCVA of 20/20 indicates that with optimal correction, the patient's visual acuity is normal, regardless of what their uncorrected VA may be.

Question 3

Legal blindness in the United States is defined as best-corrected visual acuity of:

Accepted Answer

20/200 or worse

Answer

In the US, legal blindness is defined as best-corrected VA of 20/200 or worse in the better eye, or a visual field of 20 degrees or less.

Question 4

When recording that a patient read the 20/30 line but missed 2 letters, how should this be documented?

Accepted Answer

20/30-2

Answer

Missed letters are noted with a minus sign after the VA fraction; 20/30-2 means the patient read the 20/30 line but missed 2 letters.

Question 5

Illumination of the Snellen chart should be maintained at approximately:

Accepted Answer

85–100 foot-candles

Answer

Standard chart illumination should be approximately 85–100 foot-candles to ensure consistent, reliable visual acuity measurements.

(CPOA) Certified Paraoptometric Assistant Practice Test