JCAHPO Imaging 4

Question 1

When photographing the fundus, a hazy image with reduced contrast most likely indicates:

Accepted Answer

Media opacity such as cataract or vitreous haze

Answer

Media opacities (cataract, corneal scar, vitreous hemorrhage) scatter light and reduce fundus image contrast and clarity.

Question 2

The 'early arteriovenous phase' of a fluorescein angiogram typically occurs how many seconds after injection?

Accepted Answer

10-15 seconds

Answer

The arteriovenous (transit) phase of FA typically occurs 10-15 seconds after antecubital injection, showing arterial filling before venous return.

Question 3

On OCT, a 'double hump' foveal contour in a young patient most likely suggests:

Accepted Answer

Foveal hypoplasia

Answer

Foveal hypoplasia is characterized by absent foveal pit development on OCT, sometimes appearing as a shallow or double-humped contour without the normal central depression.

Question 4

Which scanning laser ophthalmoscope (SLO) wavelength is best for visualizing the choroid?

Accepted Answer

785-830 nm near-infrared laser

Answer

Near-infrared wavelengths (785-830 nm) penetrate the RPE more effectively, allowing better visualization of choroidal structures with SLO.

Question 5

A patient undergoes wide-field fluorescein angiography. The primary advantage of wide-field imaging over standard 30-degree FA is:

Accepted Answer

Visualization of peripheral retinal pathology in a single capture

Answer

Wide-field FA (100-200 degrees) captures far peripheral retina in a single image, revealing ischemia, neovascularization, and vasculitis not visible on standard fields.

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

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

JCAHPO Imaging 4