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

The primary purpose of an optical coherence tomography (OCT) scan is to provide high-resolution images of the retina, particularly allowing for the detailed analysis of the retinal nerve fiber layer. This is especially important in the assessment and management of glaucoma, as changes in the nerve fiber layer can indicate damage caused by elevated intraocular pressure or other factors leading to glaucomatous optic neuropathy. OCT scans enable clinicians to monitor the thickness of these layers over time, which can help in early detection and management of glaucoma.

While evaluations of the corneal surface and exterior eye structures are important in ophthalmology, they are not primarily the focus of OCT technology. Similarly, although diabetic retinopathy can be assessed using OCT for retinal changes, the most specific function of this imaging technology is its capability to measure and monitor the retinal nerve fiber layer, making it essential in glaucoma care.