Ultrasound biomicroscopy (UBM) is a type of ultrasound eye exam that makes a more detailed image than regular ultrasound.
[1][2] High-energy sound waves are bounced off the inside of the eye and the echo patterns are shown on the screen of an ultrasound machine.
This makes a picture called a sonogram.
[3] It is useful in glaucoma, cysts and neoplasms of the eye, as well as the evaluation of trauma and foreign bodies of the eye.
[3] This article incorporates public domain material from Dictionary of Cancer Terms.