What types of ultrasound display systems are most commonly used in ophthalmology?

The most commonly used ultrasound display systems in ophthalmology are A-scan and B-scan. A-scan ultrasound provides valuable information on axial length measurements of the eye, which is crucial for calculating intraocular lens power before cataract surgery. This modality produces a one-dimensional representation of the eye's structure by sending and receiving sound waves, allowing for precise measurement of distances within the eye.

On the other hand, B-scan ultrasound offers a two-dimensional cross-sectional view of the eye and surrounding structures. This assists in evaluating conditions such as retinal detachments, tumors, and other orbital pathologies, giving a more comprehensive view of the anatomy compared to A-scan. Together, these two modalities provide essential diagnostic information, making them integral tools in the ophthalmologist's arsenal for assessing various ocular conditions and planning treatment.

The other options listed do not represent established modalities used in ophthalmic ultrasound; thus, they are not a consideration in clinical practice.