During a B-scan, what can overlapping the limbus achieve?

Overlapping the limbus during a B-scan is designed to enhance visibility of the posterior aspect of the eye. The limbus, which is the border between the cornea and the sclera, acts as a reference point in sonography. By positioning the B-scan probe in such a way that it overlaps the limbus, sonographers can achieve better imaging of deeper structures within the eye, such as the retina, choroid, and optic nerve. This technique helps in ensuring that the ultrasound waves are adequately transmitted and reflected from these deeper areas, ultimately leading to improved clarity and detail in the images captured.

While other factors such as reducing reflection or broadening the view of the anterior segment may be addressed through different scanning techniques, the primary goal of overlapping the limbus specifically aids in improving the visualization of posterior structures. Fixing the probe in one position does not directly correlate with this technique, as the arrangement and movement of the probe are crucial to obtaining the best possible images.