Certified Paraoptometric (CPO) Exam – Practice Test & Study Guide 2025

Optical coherence tomography (OCT) is a non-invasive imaging technology that is widely used to obtain high-resolution cross-sectional images of the retina. This technology employs light waves to take pictures of the retina, allowing for detailed visualization of its various layers. OCT is particularly valuable in diagnosing and monitoring conditions such as age-related macular degeneration, diabetic retinopathy, and glaucoma, as it provides critical information regarding the thickness of the retina and the integrity of its layers.

In contrast, while ultrasound imaging can provide useful information about the eye, it is not specifically tailored for evaluating the fine details of the retina. X-ray imaging is generally not applicable to this area due to its inability to produce the necessary detail for soft tissue structures like those in the eye. MRI scans, although useful for assessing brain and other soft tissue conditions, are not typically employed for direct evaluation of the retina due to their expense and lower availability in day-to-day eye care settings. Therefore, OCT stands out as the most suitable and effective technology for retinal evaluation.