Ultrasound biomicroscopy utilizes high frequency transducers to obtain high resolution. Our unit, with a 50 MHz transducer, achieves a resolution of approximately 50 microns, and has a tissue penetration of 4-5 mm. Scanning is performed with the patient in the supine position under standardized room lighting conditions. Scanning is performed under topical anesthesia using a 20 mm eye cup which is inserted between the lids and filled with saline solution. In vivo, cross-sectional or transverse images can then be obtained detailing the cornea, iris, ciliary body, anterior chamber angle, and peripheral sclera to demonstrate structural relationships.

Normal Eye

Normal Eye UBM Image

Angle-Closure Glaucoma

Pupillary block
Before and after laser iridotomy
Dark room provocative testing
Plateau iris
Iris cysts and tumors

Pigment Dispersion Syndrome and Pigmentary Glaucoma

Before and after laser iridotomy
Before and during accommodation

Ocular Trauma

Cyclodialysis cleft
Angle recession

Intraocular Lens Position

Capsular bag fixation
Sulcus fixation
Malpositioned IOL

Failing Filtering Blebs

Functioning blebs
Four sites of obstruction to outflow

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