What type of information does B-scan echography primarily yield?

B-scan echography is a diagnostic imaging technique that provides a cross-sectional view of the eye and surrounding structures, allowing for detailed visualization of intraocular and orbital anatomy. This method is particularly useful in assessing various conditions, such as tumors, retinal detachments, and other abnormalities within the eye and orbit.

By utilizing sound waves to create images, B-scan echography can effectively reveal the locations, sizes, and relationships of different structures, providing valuable topographic information essential for diagnosis and treatment planning.

In contrast, the other options focus on different aspects of ophthalmic assessment. Visual acuity pertains to the clarity or sharpness of vision rather than structural imaging. Color Doppler imaging specifically measures blood flow and is not the primary function of B-scan echography. Finally, optic nerve head morphology relates to the shape and appearance of the optic nerve and is typically assessed using other techniques rather than the B-scan method. Therefore, the correct choice highlights the capability of B-scan echography to yield comprehensive topographic details of intraocular and orbital structures.