What is the purpose of using B-scan ultrasonography in ophthalmology?

The purpose of using B-scan ultrasonography in ophthalmology primarily revolves around its ability to create cross-sectional images of the eye and its surrounding structures. This imaging technique is particularly valuable for assessing conditions such as retinal detachment. In cases of retinal detachments, B-scan ultrasonography allows the clinician to visualize the location and extent of the detachment, as well as any associated findings such as vitreous hemorrhage or a mass behind the retina.

B-scans are especially useful when other imaging modalities, such as fundus photography or direct ophthalmoscopy, are not possible due to media opacities like cataracts or vitreous hemorrhage that obscure the view of the retina. This capability to visualize internal eye structures without direct access plays a crucial role in the timely diagnosis and management of retinal disorders.