What is the role of B-scan ultrasound in ophthalmology?

B-scan ultrasound plays a crucial role in ophthalmology by providing cross-sectional imaging of the eye and surrounding tissues. This imaging technique is particularly valuable for evaluating the anatomy of the eye, including the posterior segment, which encompasses vital structures such as the retina, choroid, and optic nerve.

By using B-scan ultrasound, practitioners can obtain detailed images that help in diagnosing a variety of ocular conditions, such as retinal detachment, tumors, or other structural abnormalities. The cross-sectional view is essential for understanding the three-dimensional relationships within the eye and for planning potential surgical interventions.

Unlike the other options listed, B-scan ultrasound specifically focuses on providing detailed structural imaging rather than measuring physiological parameters like intraocular pressure, evaluating corneal curvature, or assessing retinal blood flow. Each of those functions requires different modalities or techniques, emphasizing the unique contribution of B-scan ultrasound in clinical practice.