Ultrasound Biomicroscopy (UBM)

Ultrasonic biomicroscopy (UBM) is a diagnostic and treatment device that utilizes 50–100 MHz high-frequency sound waves to produce a very high-resolution image but with relatively less penetration depth of about 4–5 mm. It has multiple applications to evaluate anterior segment structures; cornea, angle, iris and peripheral choroid. This chapter summarized the physics and clinical applications of UBM as a non-topographic corneal imaging.