Certified Paraoptometric Practice Test

What is the purpose of an optical coherence tomography (OCT) scan?

1. To measure intraocular pressure

2. To provide detailed images of the retina and optic nerve

3. To assess eye muscle function

4. To determine visual acuity

The correct answer is: To provide detailed images of the retina and optic nerve

Optical coherence tomography (OCT) is a non-invasive imaging technique that provides high-resolution cross-sectional images of the eye, particularly the retina and optic nerve. The primary purpose of an OCT scan is to visualize the different layers of the retina, allowing for detailed assessment of the structure and any potential abnormalities. This imaging is crucial in diagnosing and managing various retinal conditions, such as macular degeneration, diabetic retinopathy, and glaucoma. The ability to view the anatomical structures in such detail helps eye care providers monitor the progression of diseases and evaluate the effectiveness of treatments. In addition to the retina, the OCT can also be used to assess the optic nerve head, providing valuable information regarding conditions like glaucoma. This clarity in imaging is not offered by other methods that might focus on different aspects of eye health, such as measuring pressure or checking muscle function. Therefore, the role of OCT scans in providing detailed images of the retina and optic nerve is central to its function in clinical practice.