Certified Ophthalmic Assistant Practice Exam

What type of imaging provides a cross-sectional view of the retina beneficial for assessing glaucoma?

1. Ultrasound

2. Optical Coherence Tomography

3. Computed Tomography

4. Magnetic Resonance Imaging

The correct answer is: Optical Coherence Tomography

The correct answer, Optical Coherence Tomography (OCT), is notable for its ability to produce high-resolution, cross-sectional images of the retina. This imaging technique utilizes light waves to capture detailed images, allowing clinicians to assess the structure of the retinal layers with exceptional clarity. OCT is particularly valuable in the management of glaucoma, as it can help detect subtle changes in the retinal nerve fiber layer and the optic nerve head that may indicate the onset or progression of glaucoma. Other imaging modalities have different primary functions that are less suited for detailed retinal analysis. For example, ultrasound is used to evaluate ocular structures like the vitreous or detect foreign bodies but does not provide the same level of detail necessary for assessing the fine characteristics of the retina. Computed Tomography and Magnetic Resonance Imaging are typically used to visualize larger ocular structures or surrounding tissues but lack the specificity for examining the microscopic layers of the retina critical in glaucoma assessment. Thus, OCT stands out as the preferred choice for this purpose.