Question 1

Diffuse slit-lamp illumination does what?&#10;A)Illuminates directly on site of interest&#10;B)Illuminates the structure behind site of interest&#10;C)Illuminates the entire area (nonspecific)&#10;D)Illuminates the area across the surface of a structure

Accepted Answer

Illuminates entire area (nonspecific)
Diffuse slit-lamp illumination illuminates the entire area (nonspecific). To achieve this technique, the beam is opened all the way and directed onto the eye at a 45 degree angle while the microscope is directed straight ahead. This is best used to view the eyelashes, eyelids, sclera, conjunctiva, patterns of redness, iris, and pupil.

Question 2

Fundus photography can be used to diagnose all of the following except&#10;A)drusen.&#10;B)neovascularization.&#10;C)cotton wool spots.&#10;D)thinning of the optic disc.

Accepted Answer

thinning of the optic disc.
Fundus photography can be used to diagnose drusen, neovascularization, and cotton wool spots. Fundus photography is used to photograph the interior surface of the eye.

Question 3

An A-scan is a(n)&#10;A)ultrasound.&#10;B)CT scan.&#10;C)x-ray.&#10;D)topography.

Accepted Answer

ultrasound.
An A-scan is an ultrasound and is used to make a one-dimensional image of the structures of the eye. Ophthalmologists use information gathered from A-scans before cataract surgery.

Question 4

Which of the following is a technique for examining the circulation of the retina and choroid?&#10;A)Scanning laser test&#10;B)Intravenous fundus fluorescein angiogram&#10;C)Fundus photography&#10;D)Corneal topography

Accepted Answer

Intravenous fundus fluorescein angiogram
An intravenous fundus fluorescein angiogram is a technique for examining the circulation of the retina and choroid. The exam involves injecting a special fluorescent dye and capturing it in the blood with a specialized camera to see the retinal vasculature.

Question 5

Scanning laser tests can return images that indicate all of the following except&#10;A)macular thickness.&#10;B)ciliary body vasculature.&#10;C)thinning of the optic nerve.&#10;D)disc-to-cup ratio.

Accepted Answer

ciliary body vasculature.
Scanning laser tests can return images that indicate macular thickness, thinning of the optic nerve, and disc-to-cup ratio. Scanning laser tests, such as the OTC, are typically used to monitor glaucoma and retina problems.

Question 6

In ocular photography, what does exposure refer to?&#10;A)Amount of the eye that is visible&#10;B)The total volume of light that hits the image sensor&#10;C)The size of the photograph&#10;D)The size of the aperture

Accepted Answer

The total volume of light that hits the image sensor
In ocular photography, exposure refers to the total volume of light that hits the image sensor. Correct exposure is achieved through the balanced interaction of sensor, sensitivity, brightness of illumination, f-stop, and shutter speed.

Question 7

Goniography is used to view what part of the eye?&#10;A)The anterior segment&#10;B)The posterior segment&#10;C)The optic nerve&#10;D)The eyelids

Accepted Answer

The anterior segment
Goniography is used to view the anterior segment of the eye, such as the filtration angle. A gonioscope (a special contact lens sometimes containing mirrors) is placed on the patient's eye and a moderate beam is shined from the slit-lamp illuminator so that a photograph can be taken.

Question 8

In slit-beam photography, angling the slit beam serves what purpose?&#10;A)To adjust the shutter speed&#10;B)Provides an appreciation for depth&#10;C)Helps the camera focus&#10;D)Allows the camera to photograph deeper into the eye

Accepted Answer

Provides an appreciation for depth
In slit-beam photography, angling the slit beam provides an appreciation for depth.

Question 9

To illuminate an area across the surface of a structure, what kind of slit-beam illumination do you need?&#10;A)Direct&#10;B)Indirect&#10;C)Tangential&#10;D)Retroillumination

Accepted Answer

Tangential
To illuminate an area across the surface of a structure using a slit beam, tangential illumination is necessary. This technique is accomplished by swinging the slit-lamp arm to the side at an oblique angle. Tangential lighting is used to observe the anterior and posterior cornea, iris, and the anterior lens.

Question 10

Which exam uses placido discs to visually and quantitatively depict the amount of astigmatism present in the cornea?&#10;A)Fundus photography&#10;B)Heidelberg retinal tomography&#10;C)Corneal topography&#10;D)Slit-lamp photography

Accepted Answer

Corneal topography
A corneal topography uses placido discs to visually and quantitatively depict the amount of astigmatism present in the cornea. Also known as a photokeratoscopy, this imaging technique maps the surface curvature of the cornea.

Question 11

A 3-D image of the entire optic nerve can be attained with what diagnostic procedure?&#10;A)Heidelberg retinal tomography&#10;B)Fundus photography&#10;C)GDx scanning laser polarimeter&#10;D)Corneal topography

Accepted Answer

The answer of A 3-D image of the entire optic...

Question 12

A pharmacologically dilated pupil is necessary for which of the following imaging procedures?&#10;A)Scanning laser test&#10;B)Corneal topography&#10;C)Diagnostic A-scan&#10;D)Fundus photography

Accepted Answer

The answer of A pharmacologically dilated pupil is necessary for...

Deck 9: Ophthalmic Imaging