CPOA Diagnostic Testing 2

Question 1

Which instrument measures intraocular pressure by applanating a small area of the cornea?

Accepted Answer

Goldmann applanation tonometer

Answer

The Goldmann applanation tonometer is the gold standard for measuring IOP by flattening a 3.06 mm diameter area of the cornea.

Question 2

During a visual field test using automated perimetry, a 'fixation loss' means the patient:

Accepted Answer

Looked away from the fixation target

Answer

Fixation loss occurs when the patient looks away from the fixation target, causing the instrument to detect a response in the known blind spot location.

Question 3

What does the 'cup-to-disc ratio' (C/D ratio) assess when evaluating the optic nerve?

Accepted Answer

The proportion of the optic cup diameter to the optic disc diameter

Answer

The C/D ratio compares the diameter of the central cup to the total diameter of the optic disc, with larger ratios potentially indicating glaucoma.

Question 4

A corneal topography map uses colors to represent corneal curvature; warmer colors (red/orange) typically indicate:

Accepted Answer

Steeper curvature with shorter radius

Answer

On standard topography maps, warm colors (red, orange) represent steeper corneal areas, while cool colors (blue, green) represent flatter areas.

Question 5

When performing a cover-uncover test, the uncovered eye is observed to detect:

Accepted Answer

A tropia (manifest deviation)

Answer

During the cover-uncover test, movement of the uncovered eye reveals a manifest strabismus (tropia), while the alternate cover test reveals phorias.

(CPOA) Certified Paraoptometric Assistant Practice Test

(CPOA) Certified Paraoptometric Assistant Practice Test

CPOA Diagnostic Testing 2