JCAHPO Imaging 5

Question 1

Which finding on OCT is most associated with vitreomacular traction syndrome?

Accepted Answer

Posterior hyaloid attached to macula causing inner retinal distortion

Answer

VMT is characterized by the posterior hyaloid remaining attached to the macula and exerting tractional force, distorting inner retinal contour on OCT.

Question 2

Specular microscopy of the corneal endothelium measures which parameter most directly?

Accepted Answer

Endothelial cell density (cells/mm²)

Answer

Specular microscopy images and counts corneal endothelial cells, providing cell density (cells/mm²), morphology, and coefficient of variation.

Question 3

A 'staining' pattern on late-phase fluorescein angiography is best described as:

Accepted Answer

Persistent hyperfluorescence without increasing size or intensity

Answer

Staining refers to dye pooling in fibrous or scar tissue producing persistent late hyperfluorescence that does not expand, distinguishing it from active leakage.

Question 4

In optic nerve head imaging with the Heidelberg Retina Tomograph (HRT), the reference plane is set at:

Accepted Answer

350 µm posterior to the temporal retinal surface at the disc margin

Answer

The HRT reference plane is positioned 350 µm below the mean retinal surface height at the temporal disc margin to separate the optic cup from the rim.

Question 5

When a patient has poor fixation during automated perimetry, which reliability index will be most directly elevated?

Accepted Answer

Fixation loss rate

Answer

Fixation loss rate is measured by presenting stimuli to the blind spot; if the patient responds to these stimuli, it indicates the eye has moved off fixation.

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

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

JCAHPO Imaging 5