JCAHPO Patient Evaluation 4

Question 1

When using a non-contact tonometer (air-puff), the IOP reading is derived from:

Accepted Answer

The time required for the air pulse to applanate the cornea

Answer

The non-contact tonometer measures the time from air-puff initiation to corneal applanation; a shorter time indicates higher IOP.

Question 2

A patient describes sudden painless loss of vision in one eye 'like a curtain coming down.' This presentation is most consistent with:

Accepted Answer

Rhegmatogenous retinal detachment

Answer

A spreading shadow or 'curtain' obscuring peripheral vision that progresses centrally is the classic description of rhegmatogenous retinal detachment.

Question 3

When evaluating extraocular motility, which position of gaze isolates the function of the superior oblique muscle in the right eye?

Accepted Answer

Left gaze and down

Answer

The superior oblique primarily depresses and intorts the eye; its depression function is best isolated in adduction (left gaze for the right eye).

Question 4

Stereoacuity tests such as the Randot or TNO test assess:

Accepted Answer

Binocular disparity-based depth perception

Answer

Stereoacuity tests measure the ability to perceive depth from binocular retinal disparity, reflecting the quality of binocular fusion.

Question 5

The Schirmer test strip placed at the junction of the middle and lateral third of the lower lid is used to evaluate:

Accepted Answer

Aqueous tear production

Answer

The Schirmer test measures aqueous tear production by quantifying wetting of the strip in 5 minutes; ≥10 mm is generally normal.

(JCAHPO) International Joint Commission Allied Health Personnel in Ophthalmology Practice Test

(JCAHPO) International Joint Commission Allied Health Personnel in Ophthalmology Practice Test

JCAHPO Patient Evaluation 4