Ultrasound biomicroscopy is a new imaging technique that uses high frequency ultrasound to produce images of the eye at near microscopic resolution

Basic of ultrasound biomicroscopy Is based on 40 to 100 MHZ transduceres incorporated into a B- mode clinical scanner Image resolution is approximately 50 μm Reduced depth of penetration to approximately 5 mm

Quantitative studies includes Simple measurements methods such as a) Distance b) Angle measurement

Qualitative analysis include : 1) Pathophysiology of anterior segment disorders 2) Mechanism of appositional angle closure

The cornea Glaucoma Tumors IOLs Ocular adnexa The sclera Trauma

CORNEA: Internal corneal details the depth of abnormalities

Plateau iris: Anatomically anterior position of the ciliary processes Large ciliary process Medium depth of AC Slightly convex of iris surface

MALIGNANT GLAUCOMA: Shallow supraciliary detachmen Anterior rotation of ciliary body Aqueous humor is secreted posterior to the lens

Reverse pupillary block (pigmentary glaucoma) Concave configuration of midperipheral iris Large iris Posteriorly insertion of iris

Iris tumors, ciliary body tumors and anterior choroidal tumors can be imaged Borders of the tumor are usually detectable by the change in reflectivity from surrounding structures

Ultrasound biomicroscopy is a new imaging technique that uses high frequency ultrasound to produce images of the eye at near microscopic resolution